2013年5月10日 — There are 25.4 mm in 1 inch. Therefore 30mm X (1"/25.4mm) = (30/25.4) inches = 1.18 inches Direct Conversion Formula 30 mm* 1 in 25.4 mm...
Millimeter to Inch Chart. MM. Approximate Size In Fractional Inches. Size In ... 30mm about 1 3/16 inch. 1.1811. 31mm about 1- 7/32 inch. 1.220. 32mm slightly...1 页
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