Thrust ball bearing composition: Thrust ball bearing consists of three parts: seat washer, shaft washer and steel ball cage assembly. The shaft washer matched with the shaft and the seat ring matched with the housing.
The Rapid Test Kit Antigen use immunocapture method, it is designed to detect the presence or absence of nuc leocaps id proteins in respiratory samples from patients with signs and symptoms of infection who are suspected of virus.
Our bee glue propolis are all produced in direct or deep-cooperation bee farms. The raw materials are naturally pollution-free. Our detection of heavy metals and microorganisms meet national standards. It contains more than 300 kinds of active ingredients
The graphite electrode produced by our company is made of high-quality petroleum coke, needle coke, coal tar pitch and other low ash raw materials. After being calcined, batched, kneaded, shaped, roasted and pressure impregnated, it is graphitized at a te