TriMark USA, the largest U.S. dealer of foodservice equipment and supplies with nearly $2 billion in annual sales, has moved its corporate headquarters from South Attleboro, Mass., to 9 Hampshire St., Mansfield, Mass., 02048. TriMark/United East will continue to be based at 505 Collins St. in South Attleboro, Mass., 02703. All corporate e-mail address and…