Here in the Klondike, the drill serves as a kind of gas-powered, handheld time machine, bringing up frozen earth from the Pleistocene, when mammoths and other megafauna once ruled. 在克伦代克这里，以瓦斯驱动的钻孔机像是手持的时光机器，带出更新世的冰冻土壤，那是猛犸象和其他巨型动物主宰地球的年代。
An electrician was assigned to bore holes on each floor slab of a building, with the use of a concrete coring machine, in order to install conduits for wiring work. 混凝土钻孔机乃楼宇石屎层钻孔的电工技术，以便工人可在钻孔装置管道进行配线工序。
美
