4. 清洗周期：洁净区内每月清洗一次，一般区回风滤网每周清洁一次。的翻译：4. the cleaning cycle: Clean cleaning once a month in the region, general area of return air filter cleaning once a week. 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

正在翻译，请等待...

4. the cleaning cycle: Clean cleaning once a month in the region, general area of return air filter cleaning once a week.

4. Clean cycle: In the pure area each month cleans one time, the general area returns to wind mesh each week clean one time.

正在翻译，请等待...

4. the cleaning cycle: Clean cleaning once a month in the region, general area of return air filter cleaning once a week.