“hammer drill”的概念、定义、翻译、参考文献-科学参考

单词	hammer drill
释义	hammer drill [`ham·ǝr ´dril] ^{MECHANICAL ENGINEERING} Any of three types of fast-cutting, compressed-air rock drills (drifter, sinker, and stoper) in which a hammer strikes rapid blows on a loosely held piston, and the bit remains against the rock in the bottom of the hole, rebounding slightly at each blow, but does not reciprocate.
随便看	laser beam laser-beam cutting laser-beam printer laser camera laser ceilometer laser communication laser cooling laser cutting laser deposition laser detecting and ranging laser diode laser disk storage laser Doppler velocimeter laser drill laser earthquake alarm laser extensometer laser/fiber-optic gyroscope laser flash tube laser fusion laser glazing laser guidance laser gyro laser heterodyne spectroscopy laser-holography storage laser-induced fluorescence imaging

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