The Bechers' industrial vision has become an essential part of the way we see today; their head-on, deadpan photographs of pithead gear and water towers and blast furnaces have for more than 30 years expressed a serenely cool, rigorous approach that reduces the individual structures they photograph to variations on an ideal form. In this, their latest work, the Bechers' present four principally different forms of gas holders or gas tanks in 140 photographs...