| 摘要 |
The cross bar for vehicle wheels is a tubular body (1) produced by injection moulding with inner gas pressure, with a housing at least at one end to contain a joint. It is made of plastic, with one-piece joint housings (3) shaped at the ends. The injection moulding can use an expanding foam plastic, instead of an inner gas pressure, pref. a thermoplastic material with the same material base as the material of the cross bar. |
