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When feeding and managing lactating sows, attention should be paid to the choice of feed. Lactating sows are responsible for the task of providing milk for the piglets. Therefore, during the feeding process, they must provide bran soup, salt water and other foods to replenish their physical strength. At the same time, they can add supplements to the food ，broods of piglets. Helps less limb and hoof disease, less mastitis, shorter heat interval, longer effective reproduction time (more brooding). Better circulation of oxygen, less pressure (higher survival rate). Produce better milk, stronger piglets, and higher survival rates.
Feeding times
Lactating sows have a lot of physical exertion, and they need to continuously increase the number of feedings and the amount of feeding during breeding, so that the daily intake of lactating sows can reach the standard, but in the first three days of weaning, the feed intake should be gradually reduced. quantity.
Disinfection
Lactating sows have low immunity and are prone to diseases at this time. Therefore, during breeding, the pens should be cleaned regularly to clean up the food residues and feces, and then they can be sterilized in the pens for the mothers. Pigs and piglets provide a hygienic growth environment.
environment safety
After the sow enters the lactation period, its nipples and breasts are in a state of swelling, redness and inflammation. At this time, if there are sharp objects in the environment, the sow will be scratched. Therefore, clean the sharp objects in the pen and Laying straw on the ground allows sows and piglets to pass this period of reproduction and growth comfortably.
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In real life, plush toys can not only be given to children, but also girls with bursting hearts like plush toys, but when choosing plush toys for them, they are given to what kind of plush toys to choose. The boys have brought another big difficulty. You can look at，custom plush toys，to customize your own unique creativity and give her unique love.
A person who understands you is the greatest happiness. This person is not necessarily perfect, but he can read you, walk into the depths of your heart, understand everything in your heart, and the person who understands you best will always I'm by your side, silently guarding you, and don't let you suffer a little bit of grievance. People who truly love you won't say many things that love you, but will do many things that love you!
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One-third of life is spent in sleep. The four major indicators for measuring whether people have "healthy sleep" are: adequate sleep, sufficient time, good quality, and high efficiency; easy to fall asleep; continuous sleep without interruption; Deep sleep, waking up, tiredness, etc. mattress wholesale price，The quality of sleep is closely related to the mattress. When choosing a mattress, consumers can choose from the permeability, decompression, support, conformability, bed surface tension, sleep temperature, and sleep humidity of the mattress. Purchase a mattress of the right type and good quality. Since each person's specific situation is different, such as weight, height, fatness and thinness, personal living habits, preferences, etc., people should choose according to their own specific circumstances, local climate and personal economic income conditions when buying mattresses. . One of the most basic requirements is to maintain the lumbar spine physiological lordosis when lying on the back, and the body curve is normal; when lying on the side, the lumbar spine should not bend or bend sideways.
What kind of mattress is best to choose should start from the function of the mattress. The function of the mattress is to ensure that consumers get a healthy and comfortable sleep. There are two criteria for a good mattress: one is that no matter what sleeping position a person is in, the spine can remain straight and stretched; the other is that the pressure is equal, and the whole body can be fully relaxed when lying on it. This involves the softness of the mattress.
The hardness of the mattress depends on the hardness of the inner spring. In addition to the necessary hardness for supporting the spring, the spring should also have good resilience, that is, the so-called combination of rigidity and flexibility. Too hard or too soft, the rebound is not ideal. People lying on a mattress that are too hard only bear the pressure on the four points of the head, back, buttocks, and heels. The other parts of the body are not completely settled. The spine is actually in a state of stiffness and tension, which not only fails to achieve the best rest. Effective, and sleeping on a mattress like this for a long time will damage your health. A mattress that is too soft makes the whole body sunken when lying down, and the spine is bent for a long time, causing pressure on the internal organs. For a long time, it is also unhealthy and uncomfortable. Therefore, a mattress with moderate hardness should be used.
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The production of die-casting parts requires die-casting machinery and equipment. Die-casting machines are the basis for the production of die-casting parts. The technical level of die-casting equipment determines the quality and level of die-casting parts. Therefore, if you want to promote the development of the die-casting parts industry, quality die casting，you must give priority to the development of die-casting parts. equipment.
China is a big country in die casting, but it needs to be improved in terms of production technology and industry equipment.
China's Twelfth Five-Year Plan clearly states that the main task for the development of the foundry industry is to give priority to the development of major technical equipment, including "large-tonnage die-casting machine casting units", and the goal is to provide equipment support for die-casting enterprises' technological upgrading.
The development of die-casting technology and equipment will help improve the level of die-casting machinery and equipment, thereby improving the quality and technical level of castings, and promoting the development of the casting industry.
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In order to give full play to the role of CNC machine tools, reduce the occurrence of failures, and extend the life of the machine tools, the key to the maintenance of CNC machine tools is to strengthen daily maintenance. cnc machine service，The main maintenance tasks include daily inspection, weekly inspection, and monthly inspection.
Wipe the exposed parts of the screw and guide rail of the machine tool, and wash away dirt and chips with light oil
Wipe the surrounding area of all exposed limit switches, carefully wipe the gears, racks, connecting rods and detection heads of each sensor
Check the lubricating oil tank, hydraulic oil tank, oil pressure, oil temperature, and oil volume of oil mist.
Increase the temperature of the electrical system and hydraulic system for at least 10 minutes, check whether the parameters are normal, whether the air pressure is normal, and whether there is leakage
Dry running, so that all moving parts are fully lubricated to prevent jamming
Check the indexing and positioning of the tool post.
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Memory foam mattresses are still very good for children. Memory foam was invented by the Kangren company under NASA. It was first used as aerospace materials to reduce pressure on the human body and prevent collisions. Later, it was widely used in civilian adult sleep products, which has a good effect of reducing stress and can sleep in a comfortable environment. It is also a good choice for children's mattresses.
The three basics of buying children’s mattresses must be understood:memory foam mattress sale
1. Good support; the child's body is growing all the time, and different ages need different support for the spine;
2. Environmental protection: Children's immunity is much worse than that of adults. You must pay attention to environmental protection and safety issues, otherwise it will not be worth the loss to cause unnecessary physical and sleep damage to the child!
3. Breathability: The child sleeps for a long time, and 70% of the body fluid is discharged during sleep. The airtightness is easy to breed bacteria and mites, which will cause the child to feel nauseous!
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The pure silicone raw material itself is non-toxic and tasteless, but after vulcanization and high temperature molding, the silicone products made under normal circumstances will have a little odor. This is normal, and it should be left for two or three days under natural ventilation. , The smell will disappear naturally without affecting the quality of silicone products. Since the pure silicone material is odorless, how did this little smell come from?
The raw material of silica gel is transparent and odorless, but after adding color masterbatch and vulcanizing agent, it is molded by hydraulic press at high temperature. In this process, a little odor will be generated, but this odor does not affect the quality of the product, and it can be self-made.custom silicone mold manufacturer Eliminated. But if the smell of the silicone product is unusually pungent, you need to pay attention to it. It may be that the silicone product factory has used unqualified silicone raw materials or vulcanizing agents.
If you choose silicone products, you need to look for a big factory. The procurement process is guaranteed to ensure that the raw materials are 100% qualified, the production process is controlled to prevent the occurrence of abnormal situations, and the shipment is inspected to prevent defective products from flowing into customers. Silicone rubber product wholesalers choose 100% environmentally friendly silicone raw materials to ensure the quality of silicone products. At the same time, they purchase odorless vulcanizing agents. 8S strictly controls the production environment. Most silicone product manufacturers consider it inevitable and do not affect product quality. The little smell is also eliminated, giving customers truly environmentally friendly, non-toxic and odorless silicone products.
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After choosing the goggles and preparing the track, the driver should bring another set of items. The tear-off is a film intended to cover the actual lens of the goggles. If most riders live in damp mud, or their lenses are covered with dust, water or mud, they will be torn off 2-6 times per race. The tear off requires stickers on each side of the goggles. The advantage of the tear-off system is that it can cover the entire goggles, thus providing a clear vision. The second type of goggles system is called roll-off. Unlike the torn-off objects, the dropped objects are stored in two carbon canisters on both sides of the goggles, one for cleaning the film and the other for the used film. Although there are more rolls per pack than tears, they can only remove about 1 1/2 inches of strips along the center of the goggles. Many riders did not notice it, but some insisted that the entire lens must be clean. motocross gogglesThese items will greatly improve your vision on the track and are indispensable for all racers.
When buying goggles, it is important to ensure that they are the right size and shape. The size of the goggles is usually marked on the package, that is, medium, large, youth, etc. Please make sure that the size of the selected goggles is compatible with the helmet! Some helmets cannot accommodate large-size helmets, so be sure to check the helmet opening carefully before purchasing. As mentioned above, goggles with a leg system will greatly improve the fit and make it hinged around the helmet to ensure a tight seal around the face.
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Preliminary preparation for cross-country sports
Sleep is a non-negligible part of life. A good mattress not only enables you to have a comfortable sleep, but is also good for your own body. The following eight methods for mattress maintenance are recommended.
1. Regularly adjust the direction: After the newly purchased mattress starts to be used, the front and back and the top and bottom flip movements are required every three months for the first year to make each part of the mattress evenly stressed and increase the service life of the mattress;
2. Maintain air circulation: In order to ensure that the inner material of the mattress is not damp, and to increase the comfort of the mattress, air circulation must be maintained in the room where the mattress is used;
3. Avoid single-point jumping or fixed-point pressure on the mattress, avoid standing on the mattress, or single-point jump or fixed-point pressure. This will cause uneven stress on the mattress, and avoid sitting for a long time. Edge, and shorten the life span of the mattress;
4. Do not use water to clean the mattress: In case of liquid pours and penetrates into the inner layer of the mattress, do not clean it with water. You should immediately squeeze it with a strong hygroscopic rag until it is absorbed, and then use a hair dryer with cold and warm air (hot air is strictly prohibited) Or blow it dry with an electric fan. original mattress factory In addition, do not use dry cleaning fluid to clean the bed surface, which may damage the cloth surface;
5. Do not smoke on the bed or place the mattress near the flame;
6. Use cleaning pad: In order to ensure the hygienic degree of the mattress, cover the cleaning pad before covering the sheets;
7. Matching of upper and lower cushions: Do not put a board between the upper and lower cushions or put the upper cushion on an old mattress that has been damaged. You can purchase matching lower cushions to extend the life of the new mattress and sleep comfort. , The surface of the mattress is contaminated, and it can be scrubbed with alcohol in time;
8. Careful handling: When handling, place the mattress on an upright surface and do not bend or fold. This will damage the frame of the mattress and cause the mattress to distort.
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In the summer, many people will choose to wear sunglasses. When buying sunglasses, do not only pay attention to whether they are fashionable or not. Different types of lenses are also important points that cannot be ignored.sunglasses customDifferent types have different effects. So what are the types of sunglasses?
Here are some common lenses
1: Polarized lenses
The term polarized light is used a lot in sunglasses, but many people do not understand the specific meaning. In fact, this kind of lens is used to filter the glare from the sun in equal directions, and a special vertical coating is added to the lens. It is very suitable for outdoor sports (such as marine activities, skiing or fishing).
2: Color changing lens
Another name is "photosensitive lens". Originally transparent and colorless lenses, when exposed to strong light, they will become colored lenses to protect the eyes. This is because silver halide chemicals are added to this type of lens, so it needs to be used indoors and outdoors at the same time. , It is very suitable.
3: Anti-reflective protective lens
This kind of lens can prevent the reflection of strong light, allowing you to see things undisturbed under strong light, and more clearly. The principle of this kind of lens is actually very simple, that is, a layer of magnesium fluoride is coated on the surface. If you want to know whether your sunglasses are anti-reflective protective lenses, you can point your glasses at the light source. When you see purple or green reflections, it means that there is an anti-reflective protective film on the lenses.
4: Colored lenses
This kind of lens is also called "tinted lens." Sunglasses using this kind of lens can absorb light of a specific wavelength. The principle is to add some chemicals in the lens manufacturing process to make the lens appear colorful. This kind of lens is most commonly used in sunglasses.
5: Painted lenses
The effect of this kind of lens is actually the same as that of a colored lens, but this kind of lens is generally used in sunglasses with power. The most familiar one is the "graded colored lens", the color is from top to bottom. From deep to shallow.
Finally, when you buy sunglasses, in addition to looking at the corresponding types, you must also pay attention to the material selection of the glasses. Generally, spectacle lenses are divided into resin, glass and crystal. Both lenses and frames should have a shelf life. It is also important to read the product quality inspection certificate, the name of the manufacturer, and the address of the purchased glasses. At the same time, you must ask for the purchase invoice. In the event of a quality problem, you can protect your legitimate rights and interests.
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