The TPDS is installed on the main line. It uses laser displacement measurement technology to automatically detect the wheel roundness and wheel tread flat of various EMUs.

The TPDS is installed on the main line. It uses laser displacement measurement technology to automatically detect the wheel roundness and wheel tread flat of various EMUs.
The TPDS is installed on the main line. It uses laser displacement measurement technology to automatically detect the wheel roundness and wheel tread flat of various EMUs.
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