- ondometer
- 波长: wavelength
- 器: implement; utensil; ware
- 测长器，计长器: length indicator
- 波长: [物理学] wavelength◇波长标准 [光学] wavelength standards; 波长测量 wavelength measurement; 波长常数 wavelength constant; 波长单位 wavelength unit
- 测长器: length measuring instrument; length measuring machine; length meter
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