承托层(graded gravel layer)其作用只在水过滤时防止滤料从集水系统中流失，在滤池滤料层下面铺设的级配砾石层。在反冲洗时可起在一定的均匀布水辅助作用。
离开催化剂床层的反应产物穿过承托层进入反应器下部空间，然后出口离开反应器。
Finally, the reactants left the catalytic bed through the retaining wire mesh and enters the bottom space and then go outside of the Reactor outlet.
重量级特制海绵层，有效吸收体重的冲击力及震荡，提升床垫的耐用度及承托力。
A heavy-duty foam layer helps absorb motion and shock from the sleep surface, enhancing firmness and durability.
在五十四层平面内收，选用人字形斜柱转换承托顶部5层荷载。
At 54th storey, the herringbone braced frame is used to transfer loads of 5 storeys upstairs.
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