Qhov sib txawv ntawm Cement Retainers thiab Choj Plugs
Drilling & Milling Txoj Kev Ua Zoo Tshaj Plaws: Yog tias qhov xwm txheej yuav tsum ua haujlwm drilling lossis milling (quav zeb), kev pom zoo ua raws li hauv qab no: Siv tricone Bit (IADC Bit Codes 2-1, 2-2, 2-3, 2- 4, thiab 3-1) - nruab nrab nyuaj tsim. PDC Bit tsis yog ...
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