coal mining的用法和樣例：
例句
- The utilization of CMM drained in coal mining is quite difficult because it contains plenty of air.
煤礦開採時所抽採的含空氣的煤層氣難以得到很好的利用。 - With the increase of the depth of coal seams mined, rock bursts will easily occur in gateways with fully-mechanized sublevel caving mining.
摘要隨著煤礦開採深度增加，綜放開採回採巷道易發生衝擊地壓危害。 - Coal mining has always been a dangerous occupation.
採煤向來是一種危險職業。 - We have raised the coal output by using better mining methods.
我們利用更好的採煤法增加了煤炭產量。
coal mining的相關資料：
臨近單詞
coaldrop
coal
coal-electricity price linkage
coalbed methane desorption ratio
coal seam spontaneous combustion
Coal-burning endemic fluorosis
coal seam gas-bearing capacity
coal higher- vocational geology
Coal Industry Nationalization Act
coal-mining resource based city
Coal-generating electricity set
coal mine-environmental geology
