Wearing a mask has a good preventive effect on respiratory infectious diseases such as new coronary pneumonia, influenza, tuberculosis, etc. It not only protects oneself, but also benefits public
The sealing tester, also called packaging leak tester, is an instrument used by the production and processing enterprises to detect the sealing of bags, bottles, cans and other containers in the food,
The puncture resistance of plastic film or composite film is one of the important indicators of packaging materials, especially for the packaging of steamed meat products, poultry meat products in the
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