What do accrediting agencies such as NSF ensure when it comes to equipment?

NSF does not regulate or require that your product be certified. However, U.S. health departments, end users and buyers often specify NSF certification to ensure that products have been evaluated and tested, and comply with public health standards.

Explanation:

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renascimento comercial, que, a partir do século 11, inaugurou definitivamente a baixa idade média, que se estenderia até o século 15.