【摘要】 <正> 我厂自1978年起,在30吨桥式行车、15吨门座吊车等大型起重设备安装及修理中,开始应用J2-JD型激光经纬仪确定部分机件的水平和中心线位置,用以代替传统的玻璃连通器水准管、圆规、角尺及重锤等划线工具,大大提高了大型起重设备机件测量和定位工效,并提高安装的几何精度。更多还原

【Abstract】 The laser theodolite is known for its wide-range application, easy operation and high precision. In the installation and repair of heavy duty cranes, laser theodolite is superior, so far as efficiency and geometric accuracy are concerned, to the conventional instruments for measuring horizontal and centre line of the machine parts.更多还原