Underwater baseplate installation in advance is needed for semi - submersible platform pre - drilling well.
半潛式平臺(tái)預(yù)鉆井,需要預(yù)先安裝水下基盤(pán).
互聯(lián)網(wǎng)
The baseplate locates outside the handle, and has the rotary connection with handle through the sleeve.
墊板位于把手的外側(cè), 通過(guò)軸套與把手轉(zhuǎn)動(dòng)連接.
互聯(lián)網(wǎng)