- crawling gear
- 爬行: crawl; creep; serpent
- 变速齿轮: change gear
- 变速齿轮: change gear wheel; change speed gear; change spur gear; change-gear; change-speed gear; fast motion gear; pick off gear; ratio gear; speed change gear; speed changing gear; speed transforming gear; tra mi ion gear; transmission gear; variable gear
- 变速齿轮舱: gearing room
- 变速齿轮杆: change gear lever
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