They are employed by roofing and general contractors, or they may be self-employed.

他们受雇于屋面和总承包商，或者有可能成为自雇人士。

youdao

This unit group includes roofing, masonry, painting and other construction trade contractors, not elsewhere classified, who own and operate their own business.

本单元组包括拥有并经营自己的业务的屋顶，砖石，绘画和其他建筑行业承包商及其他未分类的。

youdao

O-Lyn Contractors in Norwood is calling on the "roofing community" to help the brothers and Mr. Fucarile any way they can.

WSJ: In Boston, Families Grapple With Long Road Ahead