WJ41H波紋管截止閥(fa) J61Y鍛鋼焊接截止(zhi)閥 J41W鍛(duan)鋼(gang)法蘭截止閥 J15W鍛鋼Y型截止閥 J11W鍛鋼截止閥 J41B氨用截止閥 DJ41Y低溫截止閥 J961H/Y電(dian)動(dong)焊(han)接截止閥 NKJ61H/Y真空截(jie)止閥(fa) BJ45H/W角式(shi)保溫(wen)截止閥(fa) BJ41W保溫(wen)截(jie)止閥 J44H高壓角(jiao)式截止(zhi)閥(fa)