 |
| |||
| continuously variable zoom system; variable-power optical system; pancratic system; zoom system (it provides a means of continuously varying the total microscope magnification) | |||
| pancratic lens system | |||
| transfocator; variable focus lens; variable-focal-length lens; zoom lens | |||
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pankratisches System : 4 短语, 2 学科 |
| 一般 | 1 |
| 光学（物理学分支） | 3 |