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WebSts. Volodymyr and Olha Ukrainian Catholic Church, Chicago, Illinois. 4,006 likes · 142 talking about this · 2,940 were here. Sts. Volodymyr and Olha 739 N. Oakley Blvd. Chicago, IL 60622 WebSound Transmission Class (STC ) is an integer rating of how well a building partition attenuates airborne sound. In the USA, it is widely used to rate interior partitions, ceilings and floors, doors, windows and exterior wall configurations (see ASTM International Classification E413 and E90). clover aircraft
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