sentences:  The company was established in 1985 when the Finnish engineering firm Rautaruukki started manufacturing freight wagons in Otanmäki and Taivalkoski.In 1991 the railway rolling stock works of Valmet (in Tampere), which specialised in the manufacture of carriages and locomotives, was merged with Transtech.In 1998 Rautaruukki sold the Taivalkoski factory to Telatek Oy, retaining the Otanmäki plant.