With the development of world science and technology, developed countries have integrated nuclear energy technology, microelectronic technology, laser technology, biotechnology and system engineering into traditional machinery manufacturing technology. New alloy materials, polymer materials, compos-----
It is understood that CCTV "Weekly Quality Report" exposes the country's banned plasticizers may be hiding in the plastic wrap, flow to the people's table, the International Food Packaging Association also issued a report yesterday, in the 16 samples of PVC cling film being inves-----
(I) International Carton Box Type Standard There are two major categories of international corrugated box standards. One is the International Carton Box Standard, which was approved by the International Corrugated Board Association and jointly developed by the Federation of European Corrugated Ca-----
The lack of water in the skin can lead to dryness, yellowing, dullness, sagging, wrinkles, aging, etc., so moisturizing is the foundation of daily skin care, but moisturizing products can not be used to moisturize, but also enough to add enough every day. Moisture. The practice of 8 cups of water a-----
101 type 101A electric heating blast drying oven, 202 type electric heating drying oven use The maximum working temperature of 101 and 202 electric heating ovens is 300 ℃. It is suitable for baking, oven heat treatment or other heating purposes. It is also a standing instrument in the labo-----
The preparation and use of the test solution for the dry and wet salt spray box are as follows: Method A: 1. Preparation of 5% acidic sodium chloride solution (5% neutral sodium chloride solution): Sodium chloride dissolved in distilled water or deionized water with a conductivity not higher tha-----
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