| 摘要 |
A method of manufacturing a hose coupling from an intermediate blank material, the hose coupling having an inner tube or tubular nipple portion, an outer tube or tubular sleeve portion and a head portion, all formed by plastic deformation from an intermediate blank material. The head portion is provided with a bore at an end opposite the end where the nipple portion and the sleeve portion are joined. In addition, the head portion is internally provided with a female thread and a conical seal portion.
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