An invention which cancels out the noise of a dentist's drill could help people overcome their fear of a check-up, researchers say.
研究者称，一项发明能消除牙钻在使用时所发出的噪音，而这能帮助人们克服对牙科检查的恐惧。
This drill the census that machine be applicable to solid mineral bed explores and work. The distance geology investigates etc, drills a hole and every kind of concrete construction Check bore.
本钻机适用于固体矿床的普查勘探及工程地质勘察等钻孔以及各种混凝土结构检查孔。
The main Problems with designing the flexible shaft on a screw drill are strength check and interference calculation.
螺杆钻具挠性轴设计中的两个主要问题是强度校核和干涉量计算。
When picking up drill pipe, visually check each joint of pipe picked up to be sure it is in proper sequence according to weight, grade and class as designed.
串接钻具时，要按照设计逐根检查，以便确认每个单根的重量、钢级和下井顺序正确无误。
The landing is thread connected with stop ring and tightened on and put into downhole with drill string. The landing sub is used as a sub above drill string before check valve is run in downhole.
就位接头与止动环用螺纹联结并上紧扣和钻柱连接下入井内，在未投入止回阀时作为钻柱上的一个接头。
Before you buy a portable drill, check the manufacturer warranty as well as the availability of parts.
在购买便携式钻子之前，核对下生产厂商的担保书以及可以使用的部件。
For fluid dynamics parameters, media properties of check valve performance relationship in China, in order to promote the drill string check valve research theory and technology progress.
寻求流体动力学参数、介质性质对止回阀性能的影响关系，以推进我国钻柱止回阀研究理论和技术进步。
Operation requirements of vertical borehole drilling, found the process of drill pipe shakes or difficult drilling, stones and other foreign bodies may be encountered, should immediately stop check.
操作时要求钻杆垂直，钻孔过程中如发现钻杆摇晃或难钻进时，可能是遇到石块等异物，应立即停机检查。
Operation requirements of vertical borehole drilling, found the process of drill pipe shakes or difficult drilling, stones and other foreign bodies may be encountered, should immediately stop check.
操作时要求钻杆垂直，钻孔过程中如发现钻杆摇晃或难钻进时，可能是遇到石块等异物，应立即停机检查。
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