求翻译：现场逐渐关小该锅炉的并汽阀，同时缓慢打开生火排气阀及并汽阀前放空阀，直到并汽阀全关，然后按停炉操作进行停炉；是什么意思？

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On-site gradually off the boiler and the steam valve, and slowly open firing the air outlet valve and air valve the blow-off valve, until it and steam valve full off, and then press Stop furnace operation for boiler shutdown.

Scene gradually Guan Xiaogai the boiler and the steam valve, simultaneously are slow open light a fire the discharge valve and in front of the steam valve the dump valve, until and the steam valve entire pass, then operates according to the blowing-out carries on the blowing-out;

Site gradually down to the boiler and the steam valve while slowly opening fire exhaust valve and vent valve before the valve until the steam valve fully closed, and then press the shutdown shutdown operations;

正在翻译，请等待...