GA，NV，V-系列,压力表附件压力表口NPTF型号型号型号公端NPTF母端NPTF长度mm孔径mm1/2"GA-1––3/8"3/8"71–1/2"GA-2––3/8"3/8"155–1/4"GA-3––3/8"3/8"133–1/2"GA-4––1/4"3/8"111–1/2"–GA-918–1/2"–117––––NV-2511/4"–57?4,3–––V-911/2"–64?4,8)