The moulds for the foundry are made in the tool-room area.铸造车间的模具是在工具间生产的。This punch can strike out four moulds at a time.这台冲床能一次冲出四只模子.Different fossils have been preserved in different ways - some as moulds or casts.不同...
The floatation performance of jamesonite with diethyldithiocarbamate as collector is studied.研究了以乙硫氮为捕收剂时脆硫锑铅矿的浮选性质.A new type of inhibitor ( RC ) was used for separating jamesonite from pyrrhotite.研究了新型抑制剂 RC 在脆硫锑铅矿和磁黄铁...
Having admired de Gaulle, he had little difficult with the Gaullist strain in Pompidou's approach.基于对戴高乐的仰慕, 他对蓬皮杜处事的的戴高乐气质一点不感到别扭.De Gaulle was a born pedagogue who used the public platform and the television scree...