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Tunneling speeds increase over time. The first TBM peaked at 4 meters per week. This increased to 16 meters per week four decades later. By the end of the 19th century, speeds had reached over 30 meters per week. 21st century rock TBMs can excavate over 700 meters per week, while soil tunneling machines can exceed 200 meters per week.
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.
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The following is a list of speed records for various types of vehicles.This list only presents the single greatest speed achieved in each broad record category; for more information on records under variations of test conditions, see the specific article for each record category.
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The fastest unmanned (but capable of carrying up to 8-10 people) spaceplane ever built [citation needed], weighing 100 tons or more. Flying between any two airports allow a large number of combinations , so setting a speed record ("speed over a recognised course") is fairly easy with an ordinary aircraft , although there are many administrative ...
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Free play with in-game currency and items that can be purchased from a shop or earned through gameplay Gameplay from the Age of Empires series offering online MMO features. 3D Closed July 1, 2014 Age of Wulin: Suzhou Snail Electronic Co., Ltd. April 10, 2013: Windows: MMORPG Chinese fantasy martial arts PvP game with persistent characters. 3D ...