| 摘要 |
A suspended internal mandrel apparatus for stretching a tubular film of a thermoplastic resin which comprises a mandrel, a member extending upwardly from said mandrel to which two spaced apart interior rolls are attached, and two exterior rolls disposed beneath said interior rolls and in abutting and supporting relationship therewith, said interior rolls, and exterior rolls and said member serving as the sole support means for said mandrel.
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