oil immersed switch是什么意思

用法例句

It is founded that land bitumen,the oxides of petroleum and oil soaked sandstone are of high reduction and precipitation ability to U,Mo,Se,V and Re,and fairly important to uranium metallogeny.

研究证实,石油的氧化物——地沥青及部分油浸砂岩对U、Mo、Se、V、Re等元素具有较强的还原沉淀能力,从而构成了砂岩型铀矿床成矿作用的重要环节。