4451| 5
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ISO 21771這個(gè)齒輪標(biāo)準(zhǔn)有對(duì)應(yīng)國(guó)標(biāo)嗎,? |
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點(diǎn)評(píng)
完全胡說八道,,一點(diǎn)邊都不沾,。你但凡長(zhǎng)腦子都不會(huì)把這玩意貼上來,因?yàn)橐稽c(diǎn)關(guān)系沒有的兩個(gè)標(biāo)準(zhǔn),,一個(gè)這是定義概念,,一個(gè)講精度。
豆包給的回答,,供參考
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