the control of coal system and coal seam  煤系地层和煤层的控制

coal and coal ash  煤及煤灰

Coal and Coal Char  煤与煤焦

coal and coal gas opening together  煤

coal and coal industry of Shanxi  山西煤炭

coal and coal processing in Shanxi  山西煤炭

measuring and calculating azimuth angle  倾角测算

measuring and calculating method  测算方法

measuring and calculting  测量计算

Space Measuring and Calculating  面积量算

automatic sample preparation and measuring system  自动制样送测系统

calibration and measuring system  标定监测系统

mapping and measuring system  测绘系统

microseism monitoring and measuring system  微震监测系统

Monitoring and Measuring System  监测系统; 检测系统

tool presetting and measuring system  刀具预调测量系统

ADSORBED METHANE-COAL SYSTEM  含吸附煤层气煤

air (and) coal mixture  气—粉混合物

air and coal-powder monitoring  风粉监测