Protein expression patterns in the polychlorinated biphenyl (PCB)-degrading Rhodococcussp. strain ACS were examined foll......

Printed-circuit board (PCB) elliptic antennas with useful bandwidth exceeding 10:1 ratio are suitable for wideband radar......

结合实际工作,介绍了PCB设计的基本原则,抗躁声设计、热设计、多层PCB设计等方面的技巧和方法。 Combined with the actual work,......