- creep speed drive
- 爬: crawl; creep
- 速: fast; rapid; quick; speedy
- 传动: transmission; drive; driving ...
- 变速传动: adjustable speed drive; change drive; selective transmission; speed-transforming transmission; variable speed drive; variable transmission; varidrive
- 差速传动: differential transmission◇差速传动发动机 differentially driven engine
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