- reflux line
- 回流: back-flow; inverse flow; cou ...
- 管道: pipeline; channel; tunnel; p ...
- 油回流管道: oil return passage
- 回流管: backflow connection; bypass line trip; crossover; recirculatory pipe; reflux pipe; return conduit; return duct; return line; return pipe; return tube; runback
- 回流管溢流管: overflow pipe
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