2018-5-1 · Coalbed methane resources of the Appalachian Basin, eastern USA. USGS Publications Warehouse. Milici, Robert C.; Hatch, Joseph R.; Pawlewicz, Mark J. 2010-01-01. In 2002, the U.S. Geological Survey (USGS) assessed the technically recoverable, undiscovered coalbed-gas resources in the Appalachian basin and Black Warrior basin Assessment Provinces as about 15.5 trillion cubic feet.
2018-7-1 · Relationship between input power and power density of SMA spring. NASA Astrophysics Data System (ADS) Park, Cheol Hoon; Ham, Sang Yong; Son, Young Su. 2016-04-01. The important required characteristics of an artificial muscle for a human arm-like manipulator are high strain and high power density. From this viewpoint, an SMA (shape memory alloy) spring is a good candidate for the .
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