In addition, indoor air system, heat recovery systems, central vacuum system, fire doors Solenoid Valve Control system and indoor fire hose system configurations are rare in China.
此外，室内空气系统，热回收系统，中央真空系统，防火门电磁阀控制系统和室内消防水带的系统配置在中国是罕见的。
Vacuum solenoid valve, is used for vacuum piping system, or vacuum equipment, electromagnetic valve is used to control the vacuum.
是指用于真空负压管道系统，或者真空设备上，用来控制真空的开关的电磁阀。
Vacuum solenoid valve, is used for vacuum piping system, or vacuum equipment, electromagnetic valve is used to control the vacuum.
是指用于真空负压管道系统，或者真空设备上，用来控制真空的开关的电磁阀。
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