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netty123 netty123
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6 years ago
______________________ is the measure of sound absorbed by a material.
 
  a. noise reduction coefficient
   b. sound transmission class
   c. ceiling attenuation class
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ARICHARDSONARICHARDSON
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netty123 Author
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6 years ago
Brilliant ツ
fxinternational
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Yesterday
Thank you, thank you, thank you!
smdavis
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2 hours ago
This calls for a celebration Person Raising Both Hands in Celebration
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