China Railways ET7  The China Railways ET7 class of locomotives were a series of 90 0-8-0T machines for industrial use built by Fablok of Poland.  90 locomotives were built and exported to China between 1959 and 1961 for use on industrial sites, including steelworks.Many units were still in work in the 1980s and some of the machines remained in use until the 1990s. ET7-5333 is preserved at Baotou Museum.