鱼缸圆形喂食环，内径90mm，外径102mm，高度10mm，连接杆长度40mm左右。

喂食环主体打印做好是0填充，保证内部有充足的空间（空气）可以提供浮力，否则喂食环无法浮在水面。

连接杆两端的半圆建模时留了0.1的间隙，但可能因为尺寸太小（d1.7）以及首层象脚导致打印完无法直接装配，必须用小刀（美工刀）修整一下，我认为配合间隙留小一点修起来也方便。

两个模型有搭桥的位置有个立方体辅助支撑（保证圆柱体尽量圆），打印完成后用指甲一掰就掉了，圆柱体也要用小刀修一下（刮一刮）。

Fish tank circular feeding ring, inner diameter 90mm, outer diameter 102mm, height 10mm, connection rod length approximately 40mm.

The feeding ring body should be printed with 0 fill to ensure that there is sufficient space (air) inside to provide buoyancy, otherwise the feeding ring will not float on the water.

The half-circles at the ends of the connecting rods were modeled with a 0.1mm gap, but they may not be able to be assembled directly after printing due to their small size (d1.7) and the first-floor column model. You may need to trim them with a small knife (art knife) to make them fit properly. I think it would be more convenient to leave a smaller gap for assembly.

Both models have a cubic support structure in place to bridge the gap (to ensure the cylinder is as round as possible), and once printed, it can be easily removed with a fingernail. The cylinder also needs to be trimmed with a small knife (scraped a bit).