Inspection the structure and loading test of the lifeboat ( Rescue boat ) davit.救生 ( 助 ) 艇吊架结构和压重试验.Suez Canal searchlight, but socket and davit to be supplied by builder.苏伊士运河探照灯, 但插座和吊柱由建造方提供.The strength test for davi...
In the reaction of acetylation and nitration 1,2 ? dichloroethane was used as solvent.在乙酰化、硝化反应中引入了1,2-二氯乙烷溶剂.Polyurethane demulsifier for crude oil were prepared from polypropylene glycol, xylene, toluenediiso - cyanate...