单词：pressure ring
[化] 耐压环; 压缩环
pressure ring的用法和样例：
例句
- From this time Takahashi used a compression ring ocular holder to provide precise centering of the ocular and optics of the telescope.同时，高桥在目镜的套管中使用了一个压缩环来保证目镜的中央位置以获得良好成像。
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