----- Original Message -----

From: [log in to unmask] href="mailto:[log in to unmask]">Lucia (Yan) Jin

To: [log in to unmask] href="mailto:[log in to unmask]">[log in to unmask]

Sent: Friday, March 26, 2010 2:50 PM

Subject: [TGAsia] 关于弓曲和扭曲

大家好，

有谁知道IPC-A-610D中关于使用表面安装的印制板，弓曲和扭曲应小于等于0.75%，其他类型板，弓曲和扭曲应小于等于1.5%。这里的0.75%和1.5%是怎么计算出来的？

 

 

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Best Regards

Lucia Jin

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