TRW Inc, the US-based vehicle components supplier, has opened its fourth plant in Poland - a 7,500-square-metre brake actuation booster facility in Gliwice, the company told today. The factory, on a 65,000-square-metre site, plans to launch mass production in August 2001, TRW officials said at a motor show in Poznan, 200 miles (300 kilometres) west of Warsaw.