Here one kind of reliable ventilation system (new type of mechanical drive closedown system for the wind door) is introduced, which has already been applied and good results have been obtained.(介紹一種可靠的井下通風設施新型機械傳動風門閉鎖系統，已投入應用并取得良好效果。)

Only the switchgear door is closed, and closedown state is released, Permit that grounding switch is closed.(開關柜門關閉且當閉鎖狀態解除后，才允許關合接地開關。)

The valve petal USES the spring to load, its quick closedown can effective reduce the hammer pressure, the sealing property is good, the closure does not have the noise.(閥瓣采用彈簧加載，其快速關閉能有效的減小水錘壓力，密封性能好，關閉無噪聲。)

To ensure the stable operation of resource dry - up mine enterprises' closedown and bankruptcy process has become the premise and keystone of the whole work.(保證資源枯竭礦山企業關閉破產操作平穩進行，已成為礦山企業關閉破產工作的前提和要務。)

Take hold of the sliding handle, Pull to sliding handle inside, release truck closedown , and pull out the VCB truck to service truck.(兩手握住斷路器手車的把手，朝里扳動收取定位銷，同時朝外拉斷路器手車到維修小車上。)

Secondly, we studied the market barriers systematically which are now circumscribed to greenfield entry and closedown exit.(第二，對主要作用于新建進入和關閉退出的市場壁壘進行了系統的分析。)

But some industry experts say it is unlikely to see a complete closedown of the website.(但也有部分業內人士指出，該網站并非完全被封。)

The valve achieves the function of self-closedown when the electricity is stopped by using big capacitance components and reverse pulse discharge.(最后，對電磁閥進行電路設計，采用大電容元件及反向脈沖放電，實現了斷電自關閉功能。)