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一、前言遵照伟大领袖毛主席的“独立自主,自力更生”的教导,我所工人阶级发扬了敢想敢干,不怕困难,认真负责的精神,在模板打孔、触针加工、继电器检测、组装接线等工艺上,反复多次试验,使工艺很快过关。管库房的同志主动承担了绕弹簧工作,利用业余时间很快完成了任务。科技人员和广大工人相结合,试制成功了多层印制板测试器的模型。随着大型快速电子计算机的研制,出现了多层印制电路板。印制板金属化孔及孔间连接
I. Preface In accordance with the “independent and self-reliance” education of great leader Chairman Mao, our working class has developed the spirit of daring to think hard, being afraid of difficulties and being serious and responsible, punching holes in templates, processing stylus, testing relays, and assembling wires Other processes, repeated many tests, so that the process quickly pass. Treasury Secretary gantry took the initiative to work around the spring, the use of spare time quickly completed the task. Scientific and technical personnel and the majority of workers combined trial production of a multi-layer PCB tester model. With the development of large, fast electronic computers, multi-layer printed circuit boards have emerged. Printed board metal hole and hole connections