10612| 10
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碟形彈簧的計(jì)算公式,,請(qǐng)教 |
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點(diǎn)評(píng)
基本上彈簧廠是個(gè)想申工程師的,,都弄過標(biāo)準(zhǔn),。
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點(diǎn)評(píng)
額,。。,。我那本好像有的吧,。我看了
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