BZ41Y-25P/R保温闸阀
H41H/Y-160/250..
火电汽机**快关抽气止回阀
H44Y-250Lb 高压止回阀
BQ41F-25P/40P二..
Q41F-16C/P氨用球阀
H41B-25C/40C氨用..