本文探讨了预应力钢材常温拉伸应力松弛试验中，初始试验力保持时间的意义与作用。
This paper describes the significance and role of the initial test load holding time in the tensile stress relaxation test at room temperature for the pre-stressed rolled steel.
该机采用微机控制，通过软键能调节测量光源的强弱，并能试验力保持时间，以 7 寸彩色触摸屏显示。
The machine uses computer control via softkeys measure the light intensity can be adjusted , and can test force dwell time , 7 -inch color touch -screen display.
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