4894| 10
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塑膠模具用的針是怎么加工出來的 |
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點(diǎn)評
圓PIN 是什么,圓銷釘么?
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點(diǎn)評
人家說的是注塑模具,有圓頂桿和扁頂桿之分。不是高速鋼,是模具鋼,拋光性能和熱變形都很小,有標(biāo)準(zhǔn)的也有定做的
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