| 摘要 |
An environmentally friendly and adhesive-free gymnastic auxiliary apparatus fabrication method includes the step of preparing a soft covering layer and arranging it into a tube having a tubular accommodation space defined therein, the step of inserting a tubular first foam material into the tubular accommodation space of the tubular soft covering layer, and the step of inserting an elastic solid cylindrical second foam material into the axial center hole of the tubular first foam material to expand the tubular first foam material for enabling the tubular first foam material to be compacted in between the solid cylindrical second foam material and the soft covering layer subject to the effect of the tension of the tubular soft covering layer and the elasticity of the second foam material.
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