欢迎访问《粉末冶金工业》官方网站!今天是
油气钻井极硬岩层钻头用孕镶齿研究
Study on impregnated teeth for bits in extremely hard rock formation of oil and gas drilling
{{custom_ref.label}} |
{{custom_citation.content}}
{{custom_citation.annotation}}
|
/
〈 |
|
〉 |