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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frederick the great, king of prussia was a general

well seeing i am an artist and i actually did a self portrait; i will describe how i painted it.   i used acrylic on a stretch canvas about 4 feet wide by 6 feet tall. i painted myself smiling in a soft pink long dress, white tile floor sitting on a white couch with a table behind and a vase of gorgeous flowers.   i also had a round white hat with a soft pink ribbon through it laying on the floor and on the table behind me was a lit candle. i kept it simple but soft and romantic.