Warning: file_put_contents(/www/wwwroot/ppbbu/cp667.com/cache/a3d83476eb633d1eb66f1446c10432c0.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/cp667.com/index.php on line 55 gilled pipe例句_gilled pipe英汉例句_gilled pipe双解例句_淳朴汉英词典
The paper analyses the heat transfer of bare pipe and spiral gilled pipe and proposes that the spiral pipes can strenght the heat transfer of economizer. 本文通过对光管、膜片管、螺旋肋片管的传热对比分析，提出螺旋肋片管能强化省煤器的传热。