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Referenced on: http://www.tpub.com/content/boats/TM-55-1925-204-12/TM-55-1925-204-120432.htm
An open coiled spring, wound in various forms and from different shapes and types of materials and finished at the ends, designed to provide resistance to compression forces. Excludes springs designed for thermal actuation (springs in which the torsion forces are designed to be counteracted by changes in temperature) and SPRING, REINFORCING, HOSE.
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