If a food bears a USDA Organic label, it means it's produced and processed according to the USDA standards. The seal is voluntary, but many organic producers use it. Products certified 95 percent or more organic may display this USDA seal.
A machinist is a person who uses machine tools to make or modify parts, primarily metal parts. This process of machining is accomplished by using machine tools to cut away excess material much as a woodcarver cuts away excess wood to produce his work.
Sheet metal workers are trained in the Testing, Adjusting and Balancing of mechanical systems as well as servicing them. Sheet metal workers work in both the field and in the shop utilizing mathematics and pattern layout development methods. They cut, bend, and shape sheets of metal. They use specialized fastening devices such as bolts, rivets, screws and solder.