The main reason is that cavitation erosion occurred in pervasion pipe of lubricator.经检查发现,主要原因是注油器扩散管汽蚀,以致注油器工作不正常,润滑油压偏低.Pay close attention to the conditions of lubricator and down - hole SSV, etc. during operation.作业期...
They had left school at fifteen and were quite untutored in writing.他们15岁就辍学了，几乎未接受过正式的写作训练。This untutored mathematician had an obsession with numbers.这位非科班出身的数学家对数字特别痴迷。Oliver envied the fine person and dignified manner...
We're waiting for written confirmation from the Americans.我们在等美国人的书面确认。Here, graphically displayed, was confirmation of the entire story.通过这里形象的展示证实了整件事的真实性。And it narrates main design approaches and the confirmatio...