- graduated ring
- scale ring
- 分度: scale division; scale mark; ...
- 环: ring; hoop
- 分度: [物理学] [电学] scale division; scale mark; division; graduate; graduated dial; dividing; graduation; [机械工程] indexing
- 高度环: altitude ring
- 刻度环: calibration loop; index ring; rose; scale ring
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