- dual duct
- dualduct
- 双面: two-sided; double-edged; dou ...
- 风管: flue pipe; blast pipe; blast ...
- 风管: flue pipe; blast pipe; blast main; air hose◇风管接头 blast connection; 风管音栓 labial stop; fluework; flue stop
- 表面风: surface wind
- 赤面风: facial allergic dermatitis
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