TUNNEL BLASTING SOUND REDUCTION DEVICE
PROBLEM TO BE SOLVED: To provide a tunnel blasting sound reduction device capable of providing a sufficient reduction effect against ultra-low frequency sound of 10 Hz or less.SOLUTION: The tunnel blasting sound reduction device according to the present invention can be moved in a longitudinal direc...
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Main Authors | , , , |
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Format | Patent |
Language | English Japanese |
Published |
01.09.2016
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Subjects | |
Online Access | Get full text |
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