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Drillers and Blasters? Surface Mining, Quarrying and Construction.
钻孔者，爆破工？表层采矿，采石和建筑。
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Drillers and blasters often perform both drilling and blasting activities.
钻井工人和爆破手经常进行钻探及爆破活动。
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Drillers and blasters often perform both drilling and blasting activities.
钻井工人和爆破手经常进行钻探及爆破活动。
youdao