UPVC阻火器UPVC阻火呼吸阀

PP阻火器PP阻火呼吸阀

PP呼吸阀PP带双接管呼吸阀

UPVC呼吸阀UPVC带接管呼吸阀

PPH呼吸阀PPH带接管呼吸阀

ZFQ铝合金防爆阻火呼吸阀

GYXA阻火呼吸人孔

GYXB压力排放阀GYXC紧急泄放人孔

HX阻火呼吸人孔

KZFQ-II全天候防爆快开式阻火呼吸阀

KGFQ-I全天候快开呼吸阀

FZT-1内螺纹阻火透气帽