open exhaust valve 打开排气阀
Lock the exhaust valve in its open position.
把排气阀固定在它开启的位置。
The cold air in the working chamber can convent if the exhaust valve on top of the oven is open, the temperature is controlled constant automatically by digital display instrument.
开启箱顶排气阀可使工作室温之冷空气得以对流交换，温度控制采用数字显示仪表自动恒温调节。
Upon completion of liquid charging, control system will shun down exhaust valve and open intake valve.
完成充液阶段后，控制机构将关闭排气阀打开进气阀。
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