- 双重: double; dual; twofold; dupli ...
- 轮廓: outline; line; lineament; co ...
- 承重轮: cheng zhong lun
- 负重轮: bogie wheel; bottom roller; loading wheel; road wheel
- 支重轮: balancing wheel; stabilizing wheel; su orting wheel; support wheel; supporting wheel; thrust wheel; track roller
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