gravity descent tool
[新英汉石油技术词典]
gravity descent tool靠重力下井工具
是什么意思,gravity descent tool的解释,gravity descent tool的翻译
[石油英汉词典] gravity descent tool
gravity descent tool
[新英汉石油技术词典]
gravity descent tool是什么意思,gravity descent tool的解释,gravity descent tool的翻译
[石油英汉词典] gravity descent tool