In the two-cycle engine, the piston ACTS as a valve, clearing valve ports in the cylinder wall as it nears BDC.
在二行程发动机中，活塞起到阀门的作用，当活塞接近下止点时，使气缸壁上的进排气口打开。
Industry Equipment: Air Compressor, clearing machine, Electric Valve, blower fan.
工业设备：气体压缩机，清洁机，电动阀门，鼓风机。
Other handy features include an ergonomic Venturi lever to reduce grit ingress, a new purge button that is self clearing and a new silicone exhaust valve to improve breathing performance.
其他方便的功能还包括一个符合人体工程学的手柄，以减少砂砾丘入口，一个新的清除按钮，是自清算和新的硅排气阀，以改善呼吸性能。
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