In each machine, rear-wheel drive puts the power down to the ground.
在每一台机器，后轮驱动了电源下到地面。
Remove the upper and lower board in the rear part of machine to check the motor, belt, compressor and other components for looseness which may occur during transportation.
拆开机器后部上、下板，观看内部电机、皮带、压缩机等部件得否有因运输而引起的松动。
A frame synchronization detect circuit is designed based on the synchronization state machine using FPGA, and this circuit has functions of pre-protect, rear-protect and timing of the receiver.
采用FPGA设计了一种基于同步状态机的帧同步检测电路，具有帧同步的前方保护和后方保护以及接收端的定时功能。
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