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US4094056A Decorative trim strip 失效
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Decorative trim strip
摘要:
A process for forming a decorative trim strip by extruding a thermoplastic material around a continuous length of metal strip. The thermoplastic material is shaped with longitudinal grooves and when the strip is bent along the groove, the thermoplastic material on opposite sides of the grooves comes into contact. The strip is heated and the thermoplastic material in contact fuses to essentially eliminate the grooves.
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