内螺纹角座阀JZF-15N-A50-1NC,JZF-20N-A50-1NC,JZF-25N-A50-1NC,JZF-25N-A63-1NC,JZF-32N-A63-1NC,JZF-40N-A63-1NC,JZF-50N-A63-1NC,JZF-50N-A80-1NC,JZF-15N-B50-1NC,JZF-20N-B50-1N,JZF-25N-B50-1NC,JZF-25N-B63-1NC,JZF-32N-B63-1NC,JZF-40N-B63-1NC,JZF-50N-B63-1NC,JZF-50N-B80-1NC,JZF-15N-C50-1NC,JZF-20N-C50-1N,JZF-25N-C50-1NC,JZF-25N-C63-1NC,JZF-32N-C63-1NC,JZF-40N-C63-1NC,JZF-50N-C63-1NC,