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jackhammer    音标拼音: [dʒ'ækh,æmɚ]
n. 手提钻

手提钻

jackhammer
n 1: a hammer driven by compressed air [synonym: {air hammer},
{jackhammer}, {pneumatic hammer}]

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    Construction workers are exposed to hazardous dust when using jackhammers to break concrete pavement NIOSH found that exposures could be reduced by using a water-spray attachment
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    Many tasks in construction may gen-erate dust containing crystalline sili-ca: grinding or cutting concrete, tuck-pointing masonry, using a jackhammer to break concrete, or using mobile ex-cavation equipment (e g , drills, load-ers, graders, dozers, and trucks) Op-erator cabs used in the construction industry are meant to protect the equipment operator from excessive dust and noise When the





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