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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.(介绍一种可靠的井下通风设施新型机械传动风门闭锁系统，已投入应用并取得良好效果。)
Only the switchgear door is closed, and closedown state is released, Permit that grounding switch is closed.(开关柜门关闭且当闭锁状态解除后，才允许关合接地开关。)
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.(阀瓣采用弹簧加载，其快速关闭能有效的减小水锤压力，密封性能好，关闭无噪声。)
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.(保证资源枯竭矿山企业关闭破产操作平稳进行，已成为矿山企业关闭破产工作的前提和要务。)
Take hold of the sliding handle, Pull to sliding handle inside, release truck closedown , and pull out the VCB truck to service truck.(两手握住断路器手车的把手，朝里扳动收取定位销，同时朝外拉断路器手车到维修小车上。)
Secondly, we studied the market barriers systematically which are now circumscribed to greenfield entry and closedown exit.(第二，对主要作用于新建进入和关闭退出的市场壁垒进行了系统的分析。)
But some industry experts say it is unlikely to see a complete closedown of the website.(但也有部分业内人士指出，该网站并非完全被封。)
The valve achieves the function of self-closedown when the electricity is stopped by using big capacitance components and reverse pulse discharge.(最后，对电磁阀进行电路设计，采用大电容元件及反向脉冲放电，实现了断电自关闭功能。)
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