每一个工程技术更改必须由技术部以正式的文件及时通知质量，生产，材料部门。
Engineering Dept. must inform each engineering change with formal documents to Quality Dept. Production Dept. and Material Dept. timely.
每一个工程技术更改必须由技术部以正式的文件及时通知质量，生产，材料部门。
Engineering Dept. must inform each engineering change with formal documents to Quality Dept. Production Dept. and Material Dept. timely.
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