top chock 中文意思是什麼
top chock
解釋
上軸承座-
For the tip - to - face roof stability, chock - fram type powered support only be applied to hard top - coal, shield - type powered support and chock - shield - type powered support can be applied to three top - coals
通過分析,為保證端面頂板穩定,支撐式液壓支架僅適用於頂煤為硬煤的條件下,掩護式和支撐掩護式支架在三種頂煤條件下均可以適用。
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