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壓鑄成型的零件中圓坑有什么作用,有什么用意 |
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點(diǎn)評(píng)
頂針痕跡是不樂于在產(chǎn)品上出現(xiàn)的,時(shí)間長了頂針頂部磨損反而會(huì)出現(xiàn)一個(gè)圓筒狀突起,,清除反而是很麻煩的,。
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