bottom trough /arch penetrations?(关于裂解炉)? In order t o m i nimize stresses resulting f rom expansion, clearances are provided in the bottom trough and at the arch penetrations to permit free horizontal and vertical movement of the coils(关于裂解炉辐射段热膨胀) 为了使热膨胀产生的应力降到最低,在 ???? 设置间隙,以便炉管在水平与垂直方向能自由移动。 [ ]查看更多8个回答 . 3人已关注