It will cost more, take long time and less effective by use of testing on site to develop and study downhole tool.

采用现场试验的方法研究井下工具费用高、时间长、效果差。

youdao

It will cost more, take long time and less effective by use of testing on site to develop and study downhole tool.

采用现场试验的方法研究井下工具费用高、时间长、效果差。

youdao