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機(jī)械設(shè)計的根本立腳點是固定力學(xué)/流體力學(xué)/電磁 么? |
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點評
市場決定的,上層決定的,
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點評
今天才仔細(xì)打量“非標(biāo)設(shè)計”這個概念,到底怎么界定“非標(biāo)”的界限,拿一個例子來說:一輛轎車的車長增加30厘米算不算非標(biāo),50厘米算不算?
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