| 摘要 |
A hose assembly, a hose coupling and a part therefor and methods of making the same are provided, the hose assembly having a tubular insert portion of a hose coupling inserted into one end of a hose, the external peripheral surface of the insert portion having a plurality of spaced apart annular ridges and having a plurality of spaced apart annular grooves therein that are separated from each other by the annular ridges so that the insert portion has medial grooves intermediate opposite end grooves thereof, the end grooves being narrower than the medial grooves. |
