PDF(1154 KB)
PDF(1154 KB)
PDF(1154 KB)
石油钻探自锁式钻具倒扣装置的研制
Development of self-locking drill tool back-off assembly for petroleum drilling
| {{custom_ref.label}} |
{{custom_citation.content}}
{{custom_citation.annotation}}
|
/
| 〈 |
|
〉 |