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長度至200mm一、二等標準玻璃線紋尺

Verification Regulation of Glass Line Standard for Measuring Length up to 200mm (Grade Ⅰ&Ⅱ)
標準號:JJG 73-1994
Verification Regulation of Glass Line Standard for Measuring Length up to 200mm (Grade Ⅰ&Ⅱ)
標準號:JJG 73-1994