1. Pearls should not be placed at high temperatures and in the sun, which will affect the moisture of the pearls and reduce the luster.
2. Pearls should not be in contact with cosmetics. They should not be placed in a cosmetic box, and should not be placed in a sealed plastic bag. It should be placed in a well ventilated place to maintain the brilliance of the pearl.
3. Pearls are particularly smoky, and the oily stains penetrate into the nacre. It turns yellow. This is because the main component of the pearl is calcium carbonate. Acidic and alkaline liquids contact the pearls, making it dull.
4. After wearing the pearl ornaments, use a soft toothbrush and wash with a neutral soap brush. Wash the stains on the pearls, rinse them in clean water, then dry them with a soft dry towel and dry them.
4U Chassis is also called a 4u rack-mounted classis. The rack-mountable suits 19-inch rack, U is a unit that represents the height of the outside of the chassis, 4u is the height of the Server Chassis 4 times of 44.44MM. Its main role is to place and fix the motherboard, power supply, fan and other accessories to play a supporting and protective role.
4U Chassis
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