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。
The method using movable metal baffle and control valve near water sealed well to block the drain of oil tank group is unreliable and it will widen flowing fire area.
用活动金属挡板及水封井附加控制阀门封闭油罐组排水沟的方法既不可靠又会使流淌火面积扩大。
The upper end of the vertical through hole is provided with a rotary control valve which controls the fire-feeding amount.
在垂直通孔的上端，设置有控制上火量的旋转控制阀。
The upper end of the vertical through hole is provided with a rotary control valve which controls the fire-feeding amount.
在垂直通孔的上端，设置有控制上火量的旋转控制阀。
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