查询词典 practice drill

The tractor series includes: The European leopard 12-80 horse hauls the oil line or pipe, the Dille day tows 65 horsepower, 72 horsepower, 80 horsepower drill tubings, the East Is Red series drill tubing, each kind of project machinery, high-pressured hose unit steel pipe unit and attachment body.

拖拉机系列包括：欧豹12－80马拖拉机油管、迪尔天拖65马力、72马力、80马力油管、东方红系列油管，各种工程机械，高压软管总成钢管总成及接头体。

Because of long and thin structure characteristics, and sustain high frequency impact load under erosive medium, the drill rod's serve condition is most rigorous, and drill rod is one of the most easily damage tool in the percussion drilling rock system.

由于细长的结构特征和在腐蚀性介质中承受高频冲击载荷，使钎杆成为服役条件最苛刻、在冲击式凿岩系统中最容易损坏的机件，钎杆寿命低是制约凿岩爆破技术进步的关键问题。

According to Some users investigation the cost to buy this machine can be paid off within one month by saving 3 or 4 working hrs a day through reducing waer of drill, grinding wheel, etc… Taking into consideration of that a standard reground drill can improve working speed and quality , its economic benefit will be greater than above mentioned.

据使用单位抽样调查考证，使用本机后，公节约磨钻头的自身损耗及砂轮损耗，工时损耗和钻头耐用度的提高，按每天使用3~4小时计算，一个月就收回了买机的成本。如果考虑到磨好的标准钻头，可提高工效，减少废品损失等因素，其经济效益更不可估量。

The design parameters of gun drill point are indispensable for inspection and grinding, especially in regrinding for worn drill points.

枪钻磨损后的重磨，需要知道设计参数，但生产厂并不提供。

The product can be applied for end mills, drill bits, drill reamers, taps, and can clamp any straight cutters and tools.

本产品可使用於铣刀，钻头，铰刀，丝攻及可夹任何直式的刀具及工具

Professional management of various oil machinery and equipment for oil fields, wells, mines and other industrial building supply various models of the three cone bit, PDC drill, drill pipe, fishing tool.

专业经营各种石油机械设备，为油田，水井，矿井等工业建设供应各种型号三牙轮钻头，PDC钻头，钻杆，打捞工具。

The downhole milling pipe string of screw drill tool will produce great reverse torque while milling and grinding the bridge plug, cement plug and so on, and which is extremely harmful to the screw drill tool .

针对螺杆钻具磨铣钻削井下桥塞、水泥塞及类似钻削工作中管柱在井下所产生的巨大反扭矩的危害，在对磨铣钻削管柱进行受力分析的基础上，提出了改进方案，即&井下防扭装置&和&磨铣钻削管柱的配置&，有效地降低了反扭矩带来的危害，改善了磨铣钻削管柱的受力状况。

The engineering drilling machine of KP2500 type is a species of full hydraulic pressure rotating plate-drilling machine developed by our company newly, this drill adopts full hydraulic pressure drive, con stant power variable loop, wheel cylinder startup and electrohydraulic multiple operation, the drill can adjust Torque according to stratum situation and reduce pressure to deep drilling automatically.

KP2500型工程钻机是我公司最新研制的一种全液压转盘式钻机，该机采用全液压驱动，恒功率变量回路，分泵起动，电液复合操作，钻机能够根据地层情况调整扭矩和减压自动钻进。

The mechanism of vaporization , cavitation and water-hammer of drill fluid occurring on the suction stroke of drill pump is investigated.

对钻井泵吸入过程中钻井液产生汽化、汽蚀与水击现象的机理进行了探讨。

That is an air powered grinder (portablegrinder, angle grinder, straight grinder, drill, impact wrench,riveting hammer, hammer drill).

那是一个气动砂轮机（手持砂轮机、角型砂轮、直型砂轮、钻机、冲击扳手、铆钉锤、锤钻机）。

In this new architectural plan the Garden of Golgotha came to be at the centre of the new city.

Aelia 是高举他自己，并在此城内朝拜罗马诸神。

The continuous nature of peat accumulation means that terrestrial coaly rocks may provide a higher resolution and more complete record of base-level change than the time-equivalent shallow-marine strata, thus enabling the identification of highfrequency cycles that are not recorded in themarine strata.

泥炭积累的持续性质的手段，陆地coaly岩石可提供较高的分辨率和更完整的记录基准面变化的影响时，相当于浅海阶层，从而使确定的高频周期，不记录在themarine 阶层。