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長度至1000mm一、二等標準金屬線紋尺

Verification Regulation of Metal Line Standard for Measuring Length up to 1000mm(Grade Ⅰ&Ⅱ)
標準號:JJG 170-1994
Verification Regulation of Metal Line Standard for Measuring Length up to 1000mm(Grade Ⅰ&Ⅱ)
標準號:JJG 170-1994