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表一旧API钻杆接头规范公称尺寸in螺纹类型节径Cin外径Din螺纹规范外螺纹接头内螺纹接头锥度每寸扣数扣型内径d1mm螺纹长度L1大端直径DLmm小端直径Dsmm内径d2mm螺纹长度L2镗孔直径Dcmm23/8IF2.76861:064V-0.06544767360449275REG2.37791:045V-0.0402567476827/8IF3.181051:064V-0.06554898671549588FH3.361081:045V-0.04092709094REG2.7495V-0.040327654451057831/2IF3.811211:064V-0.065681021028568117104FH3.731181:045V-0.06062951017762111103REG3.24108V-0.04038958965589141/2IF5.051561:064V-0.0659511413311495130135FH4.531461:045V-0.040801021229680117124REG4.37140V-0.04058108118917812411951/2IF6.191871:064V-0.065122127163141122143164FH5.591781:06V-0.050101127148128101150REG5.231721:04V-0.0507012014011O9813714265/8FH6.522031:064V-0.050127127172150127143174REG5.7619789152131_154