翻译成英文，“连续四年质量信得过单位”怎么说

The unit that won the QA (quality-assurance) for the 4th successive (conscutive) year.

successively/continuously four years quality trustworthy organization
或quality trustworthy organization over the last four years

Continuously for four years the quality can believe unit

quality trustworthy organization for four years

4-years quality trustworthy organization

quality trustworthy organization in the flowing four years