Dear Qu Zenglong : Here is China Printed Circuit Association Training Center, I am charge of PCB training program. I can't send a email to you with [log in to unmask] . Is your email right? Please tell me your question in Chinese, maybe I could help you. Regards, Jin Hong China Prinred Circuit Association Training Center Electronic Production Manufacture Dept. Nanjing Radio Technical Institute Email: [log in to unmask] -----Original Message----- 发件人: Feng Yi,BISC PD IE(BJ) <[log in to unmask]> 收件人: [log in to unmask] <[log in to unmask]> 日期: 1999年4月29日 15:55 主题: [TN] A/B/C/D/E Technique in PCB manufacturing Dear Sirs/Madam, I am a new comer in the PWB industry. Can you tell me what is A/B/C/D/E technique in PCB manufacturing? Best Regards Qu Zenglong Industrial Engineering Department Production Division BISC, China Tel: 0086-10-64346323 Fax:0086-10-64367731 e-mail: [log in to unmask]