6638| 15
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不改變尺寸和材料能把彈簧剛度提高3倍,?,! |
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點(diǎn)評(píng)
最簡(jiǎn)單的方式是用并聯(lián)的,,直接加三倍彈簧數(shù)量,彈簧剛度保證提高3倍,。O(∩_∩)O,。
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