| 摘要 |
<p>PURPOSE:To provide a flexible composite resin tube having light weight, high strength against pressure and freedom from a partial fracture. CONSTITUTION:A reinforcement strip 2 having the same cross section as a tube wall corrugation is spirally embedded in a spirally corrugated synthetic resin tube wall 1 in state where the strip 2 is partially polymerized with the tube wall 1 at crest sections 2A and 2A.</p> |
