q347Fq347F固定式铸钢球阀

DQ41FDQ41F低温球阀

H42HH42H/W/Y止回阀

H41HH41H/W/Y国标升降式止回阀

H44HH44H旋启式止回阀

H41H日标止回阀

H41W（H）美标自密封止回阀

H41WH41W（H）美标止回阀

DJ41H保温截止阀

DJ41HDJ41H/W/Y低温截止阀

NKJ41H/W/YNKJ41H/W/Y国标真空隔离截止阀

SDJ41H水封截止阀