A variety of factors combine in different pre-set depth and width of cracks or the way of using load to produce cracks, and then test.
结合各种因素预先设置了不同深度和宽度的裂缝或利用加载方式使其产生裂缝，然后进行检测。
2
The average flux of the PWM high-speed on-off valve are regulated by the Pulse-Width Modulation theory and it is easy to combine the computer and hydraulic control technology.
高速开关阀采用脉宽调制(PWM)原理来控制其平均流量，极易实现计算机控制技术和液压技术的有机结合。
3
One kind of conveyor belt width may adapt the certain scope pad foot spacing, the conveyor belt may willfully combine, adapted the different width;