煤电钻 meaning in Chinese

electric hand drill for coal
eletric coal drill
eletriccoaldrill
hand drill

New electric leakage protection device of electric coal drill
一种新型的煤电钻漏电保护装置
Problems and countermeasures of electric coal drill comprehensive device
煤电钻综合装置的问题及对策
Flameproof hand - held electric coal drill
隔爆型手持式煤电钻
Flame - proof rapid interruption geb for underground coal drills
煤矿用隔爆型快速断电煤电钻综合保护装置
Development of comprehensive protective device of electric coal drill motor
煤电钻电动机综合保护装置的研制

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