two-unit tester

Analyzed the influence of the hydrodynamic pressure on the two types of rubber asphalt gravel seal coat in use of "multi-functional asphalt mixture dynamic permeable test instrument" and "asphalt pavement materials moving water pressure flushing tester".

利用自主研发的多功能沥青混合料动态渗水试验仪及沥青路面材料动水压力冲刷试验仪，分析了动水压力对这两种结构类型的橡胶沥青碎石封层的影响。

Tong tester can only test the instant values of electric current, and when testing the Values of electric current of the railways' two trackages, it is needed that record the current evolutions and analyze the unbalanced factor.

钳形电流表只能测电路中的瞬间电流值，但在测量铁路的两条轨道中电流值时，需要一段时间内的两路电流变化情况进行记录并分析不平衡系数。

VID is consist of two large departments, power supply department and tester department.

威望迪电子科技公司下辖电源和试验仪器两大事业部.