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最佳答案：As you know,it is difficult for the batch printed products to have a color exact
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最佳答案：分析了某低碳合金结构钢（20CrMnMoH）制的主传动主动齿轮渗碳淬火、高频退火后花键部位批量裂纹产生的原因,是由于渗碳淬火组织不良、高频退火工艺及锻坯组织控制
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最佳答案：内容是：Hello, thank you for your help, for mass production, don't know how many gue
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最佳答案：Since this part of process is done manually, it is hard to avoid the pasting pos
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最佳答案：This test report shocked me. We have done similar tests many times and they all