变象管 meaning in English

image converter tube
image viewing tube

Generic specification for image - converter tubes and image intensifier tubes
变象管和增强管总规范
General specification for image converter tubes
变象管总规范
The methods of measurement for imageconverter tubes and image intensifier tubes
变象管和增强管测试方法
Cascade image converter tube
级联式变象管
Harmonized system of quality assessment for electronic components - generic specification : image converter and image intensifier tubes
电子元器件质量评定协调体系.通用规范:变象管和图象增强管