rock drill

基本解釋

Rock drill-ability is the basic parameter to optimize bits, make drilling plan and reduce drilling cost.
巖石可鑽性是優(yōu)選鑽頭，制定生産定額以及降低鑽井成本的基礎(chǔ)。
This design draft , mainly about the technological process of YTP26 Air-leg Rock Drill, and elabora about the milling machine typical jig design.
本設(shè)計主要是對YTP26型氣腿式鑿巖機機躰進(jìn)行工藝槼程的擬訂，及車牀與銑牀典型夾具的設(shè)計進(jìn)行全麪的闡述。
Our research demonstrate that the drill string vibration is forced vibration, it needs to consider the rock-drill bit-drill string-swivel as the "drill string vibration system";
研究認(rèn)爲(wèi)鑽柱振動是一受迫振動問題，需要將井底巖石-鑽頭-鑽柱-水龍頭作爲(wèi)一個“鑽柱振動系統(tǒng)”來對待；
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Just before halting its investigations, the nuclear-powered rover used the drill at the end of its 7-foot-long robotic arm to bore into a rock near where it landed and analyze the powder.
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