STOCKHOLM, Sweden (Dec. 4)—Trelleborg A.B. has completed its acquisition of marine fender system maker Seaward International Inc. of Winchester, Va., strengthening Trelleborg´s position as the world´s leading supplier of marine fender systems. Details of the deal, which is described as an asset-transfer transaction, were not disclosed. Seaward employs 60 and operates two plants in the Winchester area, producing annual sales of about $22 million. The company specializes in floating fender systems and other products.