雷管

diàn léi guǎn yòng yú kuàng yè

电雷管用于矿业。

Electric detonators are used in mining.

zài zhuāng yào gōng zuò zhōng léi guǎn bì xū zhèng què de fàng jìn pào yǎn

在装药工作中，雷管必须正确地放进炮眼。

The detonator must be correctly fed into the drill bole during charging work.