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關(guān)于白鋼刀和鎢鋼刀的分類(lèi),!求解 |
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點(diǎn)評(píng)
買(mǎi)回來(lái)的白鋼刀在打孔的時(shí)候直接就彎曲變形了,,扭得像麻花鉆一樣!白鋼又叫高速工具鋼,。不可能彎曲,。只有折斷。很脆,。你買(mǎi)的是假貨,。上淘寶網(wǎng),阿里巴巴看看
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