型号主流管尺寸支流管接法流通数目型号主流管尺寸支流管接法流通数目H3023/4"胶管参考左图2出2入H305-B3/4",1 "胶管参考左图5出5入+2H303-A3/4"胶管参考左图3出3入H306-A1",11/4胶管参考左图6出6入H303-B3/4"胶管参考左图3出3入+2H306-B1",11/4胶管参考左图6出6入+2H304-A3/4",1 "胶管参考左图4出4入H307-A1",11/4胶管参考左图7出7入H304-B3/4",1 "胶管参考左图4出4入+2H307-B1",11/4胶管参考左图7出7入+2H305-A3/4",1 "胶管参考左图5出5入H30101",11/4胶管参考左图10出10入