Excessive noise from transmission gear of electric drills means that the product still owns unclear problems in quality and security.
电钻传动齿轮噪声超标,意味着产品存在质量问题和安全隐患。
Conclutions Drilling and sunction noises during an otological surgery can cause temporary hearing threshold changes in the contralateral ear.
目的探讨耳显微手术中电钻及吸引器产生的噪音对非手术耳听力的影响。
By the test analysis methods of simulating field production,we study on the working instability of integrated protector for coal electronic drill.
通过模拟现场生产实际的实验分析方法,对煤电钻综合保护装置工作不稳定性进行研究,得出了综合保护装置工作不稳定的主要原因,在于使用的载频短路保护技术特性不稳定的重要结论;而影响载频短路保护技术特性的主要原因,在于电源供电网络参数通过主变压器反馈,改变了载频振荡器的谐振槽路参数,谐振频率发生变化,迫使振荡器振幅降低,甚至停振。
Design of power sharing controllers for electric drilling rig power system;
电动钻机动力系统功率均衡控制器的设计
Dynamic reactive power compensation of electric drilling rig
电动钻机动力系统的动态无功补偿
New-style quick interruption versatile protector of electric coal drill;
新型快速断电煤电钻综合保护装置
In this paper, the structure and operation mode of an electric coal drill, temporarily named MSZ-12C with hydrau-electric control is introduced.
介绍了一种暂名为MSZ 12C型的水电联控式煤电钻的结构及其工作方式。
According to the enlarging embrasure and making use of ZM12T and ZM12D coal electric drill,develops a type of ZMJ-1 equipment of determining anti_cutting intension of coal and rock used in coal_mine underground,and educes dependence formula of anti_cutting intension of coal and rock and the height of measuring curve.
根据扩钻炮眼的方法 ,利用ZM12T和ZM12D煤电钻 ,研制一台ZMJ— 1型煤岩抗截强度井下测定装置 ,并推导出煤岩抗截强度与实测曲线高度的关系
The problems in leakage protection and executive circuit of synthetical protection set in coal electric drill have been analyzed and calculated.
通过分析和计算说明老式煤电钻综合保护装置在漏电保护和执行电路中存在的问题。
Carrier frequency short circuit protection of integrated protector for coal electric drill was analysed by doing experiment,proves protect action of carrier friquency is regular when the length of cable is shorter than 200m.
针对目前煤电钻综合保护装置中的载频短路保护电路进行实验分析,证明当电缆长度小于200 m时载频短路保护动作基本正常;当电缆长度大于200 m时,保护动作不正常,并且保护动作受电缆的截面积影响程度将更加明显。
Drill for drilling wall anchor holes.
用于打钻墙壁锚栓孔的电钻。
a power drill will chatter if the bit is loose.
如果钻头松动,电钻会嘎嘎作响.
an electric drill with a range of different attachments
带有各种配件的电钻.
portable electric tool
（电钻电锯等）手提式电动工具
The Numerical Simulation of Closed-die Forging Process for a Forging Used in Manual Electric Drills;
手工电钻钻体闭式模锻工艺的数值模拟
Clinical research on application of electic burr to pyelolithotomy
复杂性肾结石电钻钻孔碎石的临床研究
Production of electrical tools, such as electric drills impact, angle angle grinder, saw, electric drill and curves.
生产各类电动工具，如冲击电钻，角向磨光机、电钻和曲线锯等。
This is the fifty-dollar saw, and the ten-dollar drill.
这是50美元的电锯及10美元的电钻。
Inverter Power Supply of Coal Drilling Based on DSPic30F3011
基于DSPic30F3011的逆变式煤电钻电源的研究
Hand picks were quickly replaced by pneumatic picks and electric drills.
手镐很快换成了风镐和电钻。
We replaced hand picks with pneumatic picks and electric drills.
我们把手镐换成风镐和电钻。
drill ,electric, hand-held (incl. rock drills)
电动钻具,手持式（包括岩石钻具）
a hammer driven by electric motor.
用电发动机驱动的钻。
polymer-polyelectrolyte drilling fluid system
聚合物-聚电解质钻井液
diesel electric driving rig
柴油机发电驱动钻机
foot engine with electric motor
牙科脚踏电动二用钻机
hand-held non-electric power-operated boring tools
手提式非电动机动钻具
gas electric rig
天然气发电机 钻机