阻火器
防爆管道阻火器QGZW
波纹阻火器ZGB
柱塞闸阀UZ41SM
丝扣柱塞阀U11SM
柱塞阀U41SM
HQ44X球形止回阀
HQ41X球形止回阀
H74对夹圆片式止回阀
H72对夹式高压止回阀
H71对夹升降式止回阀
H44T铸铁旋启式止回阀
H41T铸铁升降式止回阀