关键件和重要件质量控制程序的翻译：Critical and important quality control program 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Critical components and important pieces of quality control procedures

Critical and important quality control program

Key and heavy important document quality control procedure

Key and important quality control procedures.

Critical and important quality control program