JP2571202B
PURPOSE:To prevent the entry of noise into a room from an apparatus or the outside and to easily arrange a sound-absorbing material in a narrow passage by preparing said material by forming an air permeable elastic film to the surface of block-shape soft foamed polyurethane. CONSTITUTION:An air perm...
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Main Author | |
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Format | Patent |
Language | English |
Published |
16.01.1997
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Edition | 6 |
Subjects | |
Online Access | Get full text |
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