SEP, which is essentially active in the North American Free Trade Agreement (NAFTA) region, has operations in Mansfield and Grand Prairie, Texas, as well as in Auburn Hills, Michigan.

• 苏威工程聚合物公司在北美自由贸易协定（简称：NAFTA）区的作用举足轻重，在曼斯菲尔德和德克萨斯州的大草原城以及密歇根州奥本山均有业务开展。