直径符号(Diameter symbol) 基本尺寸,精密尺寸(Basic dimension) .
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ANSI Diameter Symbol ANSI 直径符号
crest diameter tolerance symbol 螺纹大径公差符号
pitch diameter tolerance symbol 节径符号
The 1.4m (4.5ft) diameter stone features the Cotswold Way acorn symbol at its centre, and can be found in the abbey churchyard near the Roman baths.
BBC: Cotswold Way marker to be unveiled in Bath
The 1.4m (4.5ft) diameter stone, which will feature the Cotswold Way acorn symbol at its centre, is to be set into the pavement in the abbey churchyard near the Roman baths.
BBC: Cotswold Way marker stone to be installed in Bath
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