By observation,caving and moving data of roof rock strata was acquired with mining face advancing and damage of top coal was monitored by LB data video camera.
利用深基点观测方法,在88203综采工作面回风巷内设置矿压观测站,对工作面顶煤顶板的不同层位进行深基点观测;利用LB数字摄像仪观测方法监测了顶煤的破坏发展过程。
Basing on original Rc-310 eyeground fluorescent light angiography machine, we purchased a set of digital photographic system.
在原有的RC-310眼底血管造影机基础上购置一套数字化摄像系统,将原来配备的普通光学相机改造成数字化成像影机及打印系统。