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管夹加工成本大概多少? |
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发表于 2021-7-31 16:25:44
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点评
20mm厚,确实业内罕有啊!你这估计特殊行业用的!
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发表于 2021-7-31 17:06:36
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发表于 2021-7-31 18:30:12
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发表于 2021-7-31 19:30:47
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