501. 红外探测器 Infrared Detectors
502. 红外物理 Infrared Physics
503. 红外物理与技术 Infrared Physics & Technology
504. 红外系统 Infrared System
505. 红外系统电信号处理 Processing Electric Signals from Infrared Systems
506. 厚薄膜集成电路 Thick & Thin Film Integrated Circuit
507. 弧焊电源 Arc Welding Power
508. 弧焊原理 Arc Welding Principles
509. 互换性技术测量基础 Basic Technology of Exchangeability Measurement
510. 互换性技术测量 Technology of Exchangeability Measurement
