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- 雙級PDC鉆頭two-stage PDC bit
- 雙pair
- 利用井底應力場(chǎng)研究雙級鉆頭導擴眼直徑比Research on diameter ratio of pilot to enlarger of two-stage bits using bottom-hole stress field
- 雙擊double-click
- 胎體PDC鉆頭燒結模具快速成型新工藝A new manufacture process of the mould for matrix PDC bits
- 雙級篩two-stage sieves
- PDC鉆頭雙圓弧冠部輪廓曲線(xiàn)研究A study of double arc crown profile of PDC bits
- 雙級噴射器duplex injector
- 雙級決策bilevel decision - making
- 雙級氣浮double air flotation
- 雙級耦合double stage coupling
- 雙級熱泵double-stage heat pumps
- 雙級時(shí)效double aging
- 雙級壓力two-step output pressure
- 雙級躍遷double quantum transition
- 雙級水泵tow-stage pump
- 雙級固井two stage cementing
- 配組雙級two-stage
- 雙級斜管two-stage inclined pipe
- 雙級固溶two-stage solution
