IPC-7525A -标准资料文件.pdf,IPC-7525A Stencil Design Guidelines Working Draft 1 February 2004 ASSOCIATION CONNECTING ELECTRONICS INDUSTRIES 2215 Sanders Road, Northbrook, IL 60062-6135 Tel. 847.509.9700 Fax 847.509.9798 IPC-7525A st 1 Working Draft Febru