Blank detail specification - case - rated bipolar transistors for low frequency amplification ; german version en 150003 : 1991 空白详细规范.低频放大额定功率双极晶体管
2.
Specification for harmonized system of quality assessment for electronic components - blank detail specification : case - rated bipolar transistors for low frequency amplification 电子元器件质量评定协调体系规范.空白详细规范.低频放大用管壳额定双极晶体管