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直径:50.8mm;厚度:4mm
材料:紫外熔融石英
表面面型:波长/4 @ 633nm
平行差:小于30秒
表面光洁度:3~4级
直径误差:+0.0/-0.1mm
厚度公差:±0.2mm
倒边:保护性倒边0.2~0.5mmX45°
镀膜:见镀膜列表