查询词典 drill bit

An animal-drawn seed plough; drill barrow; drill

古代的播种用的农具，由牲畜牵引，后面有人扶着，可以同时完成开沟和下种两项工作

With the increase of borehole depth, the comparative advantage of hydraulic top-drive core drill decreases. In this case, the length of drill rod stand should be increased to improve efficiency of round-trip operation.

钻孔深度加大后，动力头钻机在钻进施工效率方面的对比优势会逐渐减弱，应该考虑采取加大钻杆立根长度，从而加大起下钻速度的措施。

Drilling time will be lasted and lateral force on casing exerted by drill pipe will increase in case of drilling deep well, ultradeep well, high inclined hole, extended reach well and horizontal well, therefore, friction and wear between casing and drill pipe became a severe problem.

在深井、超深井、大斜度井、大位移井及水平井中，钻井时间延长、钻柱作用在套管上的侧向力增高，因此套管和钻柱的摩擦与磨损问题越来越突出。

ABSTRACT Drilling time will be lasted and lateral force on casing exerted by drill pipe will increase in case of drilling deep well, ultradeep well, high inclined hole, extended reach well and horizontal well, therefore, friction and wear between casing and drill pipe became a severe problem.

在深井、超深井、大斜度井、大位移井及水平井中，钻井时间延长、钻柱作用在套管上的侧向力增高，因此套管和钻柱的摩擦与磨损问题越来越突出。

Drilling time will be lasted and lateral force on casing exerted by drill pipe will increase in case of drilling deep well, ultradeep well, high inclined hole, extended reach well and horizontal well, therefore, friction and wear between casing and drill pipe became a severe problem.

钻杆接头与套管摩擦磨损问题的理论与试验研究套管磨损

It is necessary to study the connecting technique between the drill cutter and placenta, because the connecting quantity affects the working life of drill.

钻头切削齿与胎体的连接质量关系到钻头的使用寿命，因此有必要对切削齿与胎体的连接技术进行探讨。

The main products are:"30 mm, 26 mm-mm, 24 mm and 20 mm hammer; 13 mm, 10 mm, and 6 mm electric drill and impact drill; 110 millimeters marble cutter, 100 ~ 150 mm series of angular grinding ray machine, electric saw, sanding machine."

主要产品有：&30毫米、26毫米毫米、24毫米、和20毫米电锤；13毫米、10毫米、和6毫米电钻及冲击钻；110毫米云石切割机、100~150毫米系列角向磨光机、电圆锯、砂光机等。&

The main products have the overall carbide drill bits, milling cutter, reamer, BORING, T-type milling cutter, drill sets as well as the kinds of non-standard alloy cutting tools.

主要产品有整体硬质合金钻头、铣刀、铰刀、镗刀、T型铣刀，合金钻套以及各种非标刀具。

In this special to recommend various mature products: the overall tungsten steel cutter, drill, reamer, the drill reamer, Boring knife, light rods, knives Series.

造设备和技术，采用国内外最优质的棒材。形成优质、高效、先进的生产制造系统。光棒、雕刻刀系列。

Shanghai Richu Tools company was set up in May,2001,registered in Malu Economic Hope City,specially produces various non-standard hard alloy cutters and measures, such as polishing drill,twist drill,reamer,milling cutter,pushing broach and various welding cutters.

上海日初工具有限公司成立于2001年5月，注册于马陆经济希望区，专业生产各类非标准硬质合金刀具及量具，例如：铰刀、铣刀、推刀及各类焊接刀具。

Continuously improve the production mechanism, to provide customers with better quality products and services.

不断的完善生产机制，给客户提供更优质的产品及服务。

B:Yes, he was the very prize-winner in the court tennis ten years ago?

是的，他是十年前的世界网球冠军。