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中國需要‘專才’嗎,顯然不需要,, |
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點(diǎn)評(píng)
大俠怎么會(huì)玩,,看你玩過彈簧,,不知道能不能玩彈簧外形。鋼絲直徑0.18,,外徑1.8,,長度7,要求做成橄欖形,,外徑1.8指橄欖形最大處,,兩端直徑在1.2且并絲3圈。兩端直徑在1.0且并絲3圈,,?兩端直徑在0.8且并絲3圈?
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