Aiming at solving the defects of exproted Plast-Ripple-Duct tensile tester such as including all technical rules by halves and operating very complexly, the longitudinal tensile fixtures is improved.

• 针对原塑料波纹管拉伸试验装置既不能完全覆盖引进的技术规定又操作特别繁琐、复杂的状况,对其纵向拉伸载荷夹具进行了改进。