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长度至200mm一、二等标准玻璃线纹尺

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