- travel plunger
- 伸缩: stretch out and draw back; e ...
- 行程: route or distance of travel; ...
- 内缩行程: inward stroke; retract stroke; retraction stroke
- 收缩行程: prestroke; retraction stroke
- 压缩行程: combustion stroke; combustionstroke; compression cycle; compression travel; compressionstroke; instroke; pressure stroke; scavenging-compression stroke
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