There is disclosed a printed circuit board test apparatus which has a test bed formed by a planar member having a plurality of through channels at close spacing across its surface to receive test probes. Each of the test probes comprises a tubular body having a top contact surface and a socket at its...http://www.google.com.tw/patents/US5485096?utm_source=gb-gplus-share專利 US5485096 - Printed circuit board tester having a test bed with spring probes and easily replaceable switch cards
