推车和方向盘转向指示灯，操作便捷。
Convenient operation by indicator light for how to push car and turn the steering wheel.
传动原理也十分简单，操作便捷简单，同时工作效率也很高。
Transmission principle is also very simple, convenient operation simple, meanwhile work efficiency is also very high.
该法具有设备简单、操作便捷、分析速度快、用样量小等优点。
The method has several characteristics such as simple equipment, easy to handle, high analysis speed, and small volume of the water sample needed.
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