查询词典 drill bit

It has to be tall because it is like a giant block and tackle ,and we have to lower into the ground and haul out of the ground great lengths of drill pipe which are roated bu an engine at the top and are fitted with a cutting bit at the bottom.

井架必须很高，因为它像个巨型滑轮组。我们必须把很长的钻杆一节节地钻入地下，然后再从地下拉出来。钻杆顶部安装的发动机带动钻杆旋转，它的底部装有钻头。

It has to be tall because it is like a giant block and tackle, and we have to lower into the ground and haul out of the ground great lengths of drill pripe which are rotated by an engine at the top and are fitted with a cutting bit at the bottom.

钻井必须很高，就象一个巨大的滑轮。我们必须降到地下然后将钻杆拔出来。钻杆的顶端有一个马达使它旋转而底部是一个尖头。

It is proposed that the appearance of a new kind of mud additive can not represent the formation of a new mud system . The main influence factors of flow resistance at drill bit nozzle are solid content , particle size distribution and hydrophilicity of solid . It is not suitable to use high shear viscosity of both Casson rheology model and determined to predict drilling efficiency .

全面、系统地论述了处理剂和泥浆体系的关系；聚合物的使用浓度应突破全絮凝点，实现低固相应以发挥聚合物的抑制作用为主，絮凝作用为辅；影响钻头水眼处流动阻力的主要因素是泥浆中的固相含量、粒度分布及固相的亲水性，用η_∞代表钻头水眼粘度是欠妥的；聚合物泥浆处理剂的发展主要是开发新的单体和研究新的复配物。

I put a drill bit in the center holes and turned the two plates while checking with my digital caliper for the best alignment.

我把一钻头在中心孔，把两大板块的同时，检查与我的数显卡尺为最佳路线。

The first guiding portion (19) projects farther radially outwardly than the second guiding portion (20) relative to the center axis of the drill bit.

相对于钻头的中心轴线，第一导向部分(19)径向向外伸出得比第二导向部分(20)远。

The equation of length between drill bit and centralizer is obtained.

扶正器与钻头之间的安放间距均减小。

Using hot-press techniques to fix ceramal in drill bit is trusty.

同时利用热压工艺将陶瓷固定在钻头体上是可靠的。

I also used a countersink in a hand-drill to chamfer the mounting holes a bit.

我还用在手锪钻的安装孔倒角一点。

For oil drilling, oil and gas wells in the circulation rotary drilling mud to increase agent, cooling the bit, cutting away material from the debris, lubricating the drill pipe, closed hole wall, oil and gas pressure control to prevent the oil from the spray.

用于石油钻探，油气井旋转钻探中的环流泥浆加重剂，冷却钻头，带走切削下来的碎屑物，润滑钻杆，封闭孔壁，控制油气压力，防止油井自喷。

Company specializing in computer graver (knives, knife-chu, lace cutter, 1/4R knife) Solid Carbide; bit, milling cutter, reamer, reamer drill, boring knife, knife tools, such as conga, and for the user design the production of a variety of strange and knives.

公司专业从事电脑雕刻刀尖刀、柱刀、花边刀、1／4R刀）整体硬质合金；钻头、铣刀、铰刀、钻铰刀、镗刀、孔加工具刀等，并为用户设计制作各种奇难刀具。

The teacher likes the honeymouthed little girl very much.

老师很喜欢这个嘴甜的小姑娘。

Mr. Notker Bien's interests are traveling, spending quality time with the family and long-distance-running.

诺特卡·柏恩先生热爱旅游，长跑，以及和家人一起共度美好时光。