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A tunnel washer, also called a continuous batch washer, is an industrial washing machine designed specifically to handle heavy loads of laundry. The screw is made of perforated metal, so items can progress through the washer in one direction, while water and washing chemicals move through in the opposite direction.
A tunnel boring machine (TBM), also known as a "mole" or a "worm", is a machine used to excavate tunnels. Tunnels are excavated through hard rock, wet or dry soil, or sand, each of which requires specialized technology. Tunnel boring machines are an alternative to drilling and blasting (D&B) methods and "hand mining".
Beck tunnel boring machine; Bertha (tunnel boring machine) M. Martina (tunnel boring machine) T. Tuen Mun–Chek Lap Kok TBM
Freighter Fairpartner carrying the disassembled tunnel boring machine into the Port of Seattle in April 2013. Bertha was designed and manufactured by Hitachi Zosen Sakai Works of Osaka, Japan, and was the world's largest earth pressure balance tunnel boring machine, [14] at a cutterhead diameter of 57.5 feet (17.5 m) across.
Issues such as soil remediation goals and planning for brownfield reuse are important to address. [5] Most of the brownfield sites for redevelopment are located in cities, and can be used for residential or commercial purposes to obtain the greatest land price. [5] However, many have pollution history spanning half a century or more. [5]
The front of the machine is equipped with a stationary drill tip which is kept at 700–930 °C (1,300–1,700 °F). The molten rock is pushed around the edges as the vehicle is forced forward, and cools to a glass-like lining of the tunnel. Massive amounts of energy are required to heat the drill head, supplied via nuclear power or electricity.