求助一句话的理解? slag tapping is in "manual-run" mode, all burner double-block and vent valves are powered-up and shut with their vents open with the exception of the nitrogen double-block and vent system (yv 4420, yv 4430 & yv 4440) which is open, as is the main air/nitrogen flow control valve, fc4380 液态排渣为"手动"方式,所有燃烧器(嘴/枪)的双切断阀块和排气阀通断电都是在各自排气口开放的状态下,除氮气双切断阀和其长开的排气系统(yv4420...)外,主空气/氮气流量控制阀fc4380也一样.查看更多