Polypropylene PP fiber has the advantages of high strength, good toughness, good chemical resistance and antimicrobial resistance, and low price, so it is widely used in ropes, fishing nets, safety belts, luggage belts, safety nets, sewing threads, c…
Foam concrete contains a large number of closed pores, the air in the pores is a good adiabatic medium, which can cut off the heat exchange.…
In the face of rising oil prices, the 31 member countries of the International Energy Agency decided in early March to release 60 million barrels of crude oil reserves. However, the market's reaction to this statement was not strong, and oil prices c…
In international trade, the indirect and local inspection of import and export commodities is closely related to the vital interests of buyers and sellers, as it involves inspection rights, inspection agencies and related claims.…
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