Refers to an organic compound of antimony many Sh-C bond-containing compound, the type, it can be divided into trivalent antimony and pentavalent antimony two categories, the former comprising 1 to 4 organic groups (SbR 4, SbR 3, H 2 SbX And RSbX 2 ), the latter comprising 1 to 6 organic groups (R 5 Sb, R 4 SbX, R 3 SbX 2 , R 2 SbX 3 , RSbX 4 and SbR 6 ), in addition to organic diterpenes R 2 Sb -Sb-R 2 , an oligomeric and polypolymeric compound containing more than one Sb-Sb bond (RSh)a, and a derivative of the aromatic organic anthracene, benzene, many derivatives of dihydroxydecanoic acid, RabO(OH) 2 and ruthenium Acid derivative. Recently, there have been many studies, and the important ones are ethylene glycol oxime and thiolactam. EWH Explosion-Proof Electric Hoist EWH Explosion-Proof Electric Hoist,Electric Belt Hoist,European Standard Hoisting Mechanisms,European Belt Hoist Eurocrane (China) Co., Ltd. , https://www.craneparts.pl