liuxilin1215 发表于 2017-3-13 11:37:17

BS EN ISO 10424-1-2004 (2009) Petroleum and natural gas industries — Rotary dr

BS EN ISO 10424-1-2004 (2009) Petroleum and natural gas industries — Rotary drilling equipment — Part 1: Rotary drill stem elements


admin 发表于 2017-3-13 16:24:47

谢谢您的分享,金币已奖励!

hxlea 发表于 2018-8-20 11:18:49

你的分享是我学习的动力，感谢
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