QB2双口排气阀

J61Y-J61Y焊接针型阀

J13W-内螺纹针型阀

JJM1-针型阀

J49H-压力计针型阀

JJBY1-16C,25C,40C-碳钢取压针型阀

J13W-64C,100C,160C-碳钢内螺纹针型阀

J13W-320P-内螺纹针型阀

J23W-320P-外螺纹针型阀

J24W-320P-角式针型阀

J61Y-320P-承插焊针型阀

J91W-320P-卡套针型阀