支架大流量安全阀的作用是什么？

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问题问答题论述题

支架大流量安全阀的作用是什么？

答案

参考答案：大流量安全阀的作用是在工作面顶板来压极强烈时，使立柱活塞腔急速储存的能量迅速释放出来，避免立柱及支架部件的损坏。

选择题

( ) 1.	A. I usually visit grandparents with my parents.
( ) 2.	B. He often plays football after school.
( ) 3.	C. I often go to school with my friends.
( ) 4.	D. I clean my room every weekend.
( ) 5.	E. She sometimes goes shopping with her mother.

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