roller drill 中文意思是什麼
roller drill
解釋
帶鎮壓輪的播種機-
The personal computer control system for roller drill
牙輪鉆機微機控制系統 -
Development and application of track shoe tensioner of toothed roller - bit drill
牙輪鉆機履帶板調緊器的研製與應用 -
The solid carbide end mill and drill, the solid carbide circular saw blades, the strip for chemical fiber, the cutters for steel fibers, the carbide hot roller for steel wire at high speed and the high performance carbide dies are our main products
公司主導產品：整體硬質合金立銑刀、鉆頭、整體硬質合金鋸片銑刀、化纖切斷刀、硬質合金滾刀、高速線材軋機用硬質合金熱軋輥、硬質合金模具材料等。 -
The design that the active protection is taken in the paper is a breakthrough of common methods of gage protection. on the basis of the well - done roller cone bits and pdc bits, three practicable schemes are provided. as a result of selection and design, two brand - new multiple drill bits are invented, that is, protector - tri - cone mdb and protector - single - cone mdb
本論文突破傳統的被動保徑思維，採用主動保徑方法，並在業已成熟的牙輪鉆頭和pdc鉆頭技術的基礎上，提出了三種可行的復合鉆頭實施方案，並經過精心選擇和設計，推出兩種新型復合鉆頭，即變徑保徑器?三牙輪復合鉆頭，變徑保徑器?單牙輪復合鉆頭。
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