铜川矿务局煤炭基建公司二处一队、二队和四处,从1973年11月以来,在陈家山和下石节矿的斜井掘进中,利用激光光束指向,取代拉线绳和经纬仪的导线测量方法,准确而迅速地给定斜井中心线与腰线,取得良好效果,分别创造月进尺504,605、705米不断提高的新记录。这是测量工作的一项重大技术 Tongchuan Mining Bureau of coal infrastructure companies in a second team, two teams and four, since November 1973, Chen Jiashan and Xiaoshijie mine inclined shaft heading, the use of laser beam pointing, instead of cords and theodolite wire Measurement method, accurately and quickly given the incline centerline and waist line, and achieved good results, respectively, to create a new footage of 504,605,705 meters on a continuous basis. This is a major measurement technique