H44B氨用止回閥

J41B方(fang)形氨用截止閥

H42B氨用止回閥

Q41B氨用球閥

J21B氨用截止閥

J11B氨用截止閥

J14B氨用直角式截(jie)止閥

J42B角式氨用(yong)截止閥

J41B法蘭氨用(yong)截止閥(fa)

J24B外(wai)螺(luo)紋角式氨用截止閥