一个精密仪器的零件长2.5mm,把它画在一幅设计图上长1dm,求这幅的比例尺.
人气:220 ℃ 时间:2019-11-24 00:08:25
解答
寒樱暖暖为你
比例尺=1dm :2.5mm
=100mm:2.5mm
=40:1
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