The main component in 4 # solvent is liquefied butane.四 号 溶剂主要成分为液化丁烷.Butane and butylenes has the same characteristic with propane and propylene.丁烯与丁烷表现出与丙烯、丙烷相似的特性.The butane conversion of catalyst aged in different pH...
Butane and butylenes has the same characteristic with propane and propylene.丁烯与丁烷表现出与丙烯、丙烷相似的特性....replaceable butane gas cartridges.可替换丁烷气贮气瓶The butane conversion of catalyst aged in different pH has similar value.在不同pH...
As part of a global programme , 89 ozone - depleting substances are under legislative control.此外, 又对89种消耗臭氧层的物质实施法例管制,以配合全球的行动.A class I substance is any chemical with an ozone - depleting potential of 0.2 or greater.I类别...
别忘了震中的所有通讯都中断了.Don't forget that all communication at the epicentre also been cut.他是怎样测定震中的还是个谜.It is a mystery how he located the epicenter.某地与震中的距离叫震中距.With a certain distance from the epicenter of the call from t...
The law, in its present form, is unjust; it needs modification.现行的法律是不公正的; 它需要修改.The design requires considerable modification.这个设计需要作大的修改." Of course we are, " he said, with the slightest modification of sharpness.“ 当然肯...