The test solution is to sense light shine, put the coil with the plate, a long red light when taking iron, brakerod fall automatically is normal.
测验办法是，地感红灯闪耀时，用铁板放在线圈上，红灯长亮时取走铁板，闸杆主动落下则正常。
2
Then, in view of the actual operation for pumping problems such as the belt, broken rod, rod case of cards brake and so on in a depth discussion and analysis, and proposed solution to the problem.