J43W J43H J48W J48H法兰针型阀

WJ61W WJ11H波纹管针型阀

J21陶瓷芯针型阀

J61Y高温高压针型阀

J61Y焊接式针型阀

J11W内外螺纹针型阀

SS-5PDF8-M8美标内外螺纹针型阀

J23W/H外螺纹针型阀

J21W/H外螺纹针型阀

J13W/H内螺纹针型阀

J13W内螺纹针型阀

J94W/H卡套角式针型阀