电离辐射源 meaning in English

ionizing radiation source

Nuclear instrumentation ; electrical measuring systems and instruments utilizing ionizing radiation sources ; general aspects
核仪表.使用电离辐射源的电气测量系统和仪表.一般特性
Nuclear instrumentation - electrical measuring systems and instruments utilizing ionizing radiation sources - part 1 : technological safety requirements
核测量仪.电气测量系统和用电离辐射源工作的测量仪