放頂距 的英文怎麼說
中文拼音 [fàngdǐngjù]
放頂距
英文
caving interval-
The effects of different drawing interval and top - coal fragmental size on flow character of coal - gangue and sand, and on mixed degree of coal and gangue were analyzed during drawing top - coal
分析了不同放煤步距、頂煤塊度對放煤過程中煤矸砂流動形態、混矸程度的影響。If increasing drawing interval, the movement and flow range of top coal will enlarge, and the velocity gradient on flow cross - section will diminish, so that it is good for controlling the flow rate of thin sand among loose top coal
研究表明，加大放煤步距，頂煤運移流動的范圍變大，流動斷面內速度梯度變小，有利於控制細砂的下竄速度。The test results show that the drawing interval of 1. 5 m is helpful for controlling dead - unconsolidated thin sandstone of coal seam roof and reduce sand ratio of drawn top - coal
試驗結果表明，放煤步距採用三采一放有利於控制頂板極鬆散細砂巖，降低放出頂煤的含砂率。What he doesnt realize is that it is filled with ammunition. the thing explodes, he doesnt have enough time, hes traveling at 300 miles an hour, doesnt have time to do anything and he goes right through the explosion. he ducks and says the only thing i can do is duck and it saved his life, it took the canopy right off of the plane
他距離火車一千尺時急降和發射，誰知火車里放滿彈藥，那麼它爆炸了那時他以時速三百哩飛行，他來不及逃命，唯有直飛越爆炸堆他說他只有低頭彎身才避免喪命，飛機的頂蓬也炸毀了分享友人