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折彎的時(shí)候斜接法蘭處會(huì)凸起是因?yàn)槭裁矗?/span> |
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恩呢 謝謝大俠指點(diǎn)
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折彎的時(shí)候中性層會(huì)改變? 會(huì)改變還稱為中性層。 出錯(cuò)誤咯!
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