| 摘要 |
The present disclosure is directed to a process and a heating apparatus for permitting the production of crimped, compressed, and beaded sections in tubular pieces made of a synthetic material which comprises a means adapted to receive a tubular piece, said means provided with a heating means for selectively heating a portion of said tubular pieces and cooling means associated with at least one of the marginal areas surrounding said heated portion thereby preventing distortion of the tubular pieces in said marginal areas.
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