We immediately got our helmet and headlight and go down the adit .
我们立即领取了头盔及头灯，准备下矿洞探险。
By applying comprehensive opencasting technology and comprehensive technical research of the main adit reinforcement and monitoring , nanfen open pit mine has ensured a safe production of its adit chute transportation system and meanwhile created enormous economic value .
This paper introduces the relevant conditions of the comparison and selection of wencheng tunnel schemes , and discusses design parameter adopted in the design , assistant adit , operation ventilation and tunnel construction management planning , which to offer a reference for similar project .
