The elevator model was made by using devices such as limit switch, nixie tube, direct current motor.

采用限位开关、按钮、数码管、直流电机等器件实际制作。

youdao

The elevator model was made by using devices such as limit switch, nixie tube, direct current motor.

采用限位开关、按钮、数码管、直流电机等器件实际制作。

youdao