The article analyzes specifically dust control for effectiveness reasonableness and introduces calculating methods of blow and exhaust wind volume of Push pull ventilation device.
对其烟尘控制的有效性和合理性作了具体分析，同时介绍了吹吸式通风装置送、排风量的计算方法。
Push-pull horizontal arm, tilt back vertical arm, equipped with assistant inflating device and helper HL360, make the operation time saving, safe and easy.
该机为推拉臂、后倾式立柱的全自动机型，还具有快速充气装置。并配有HL360型机械手，操作起来更为快捷、安全、省力。
Manual push-and-pull device facilitates customers to access to ventilation and light when fans are not required.
手动推拉装置。方便客户在无需使用风机时也能透风采光。
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