钢绳钢丝两用伸长测量仪及应用

Dual purpose Extension Measuring Instrument for Steel Wire and Rope and Its Application

介绍Ｌ－２５０型、Ｌ－６００型钢绳钢丝两用伸长测量仪的结构、性能、使用方法，弹性模量、屈服负荷、伸长率、应力松弛试验方法以及配套试验机的改装和国产低松弛预应力钢丝和钢绞线应力松弛试验机的开发。

To introduce the structure,performance and operation of L 250,L 600 dual purpose extension measuring instrument for steel wire and rope,as well as the testing methods of elastic modulus,elongation ratio,permanent extension rate and relaxation effect have been introduced The refitment of other testing machines and the development of domestic relaxation testing machine for low relaxation prestressed steel wire and steel strand have been also briefed