footage measurement of workings
... 不同道信号传输 不同频道信号传输 outofband 巷道验收测量 footage measurement of workings 巷道验收丈量 footage measurement of workings ...
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footage measurement of roadway
露天矿高程控制测量vertical control surveying of surface mine 巷道验收测量footage measurement of roadway 巷道中线标定setting-out of center line of roadway ..
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