9878| 28
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簡(jiǎn)單零件的機(jī)械加工 |
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點(diǎn)評(píng)
差不多啊,這種材料本身就30多一公斤了,再加上人工等成本,一個(gè)也就賺你5塊錢而已
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點(diǎn)評(píng)
3塊不掙啥錢了,大批量還行,要知道材料貴啊,還有損耗
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