![File:QRS "Red Top" Super Detector-Type Radio Tube By QRS Music Co., Circa 1920s (8723311651).jpg - Wikimedia Commons File:QRS "Red Top" Super Detector-Type Radio Tube By QRS Music Co., Circa 1920s (8723311651).jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/thumb/3/3f/QRS_%22Red_Top%22_Super_Detector-Type_Radio_Tube_By_QRS_Music_Co.%2C_Circa_1920s_%288723311651%29.jpg/1200px-QRS_%22Red_Top%22_Super_Detector-Type_Radio_Tube_By_QRS_Music_Co.%2C_Circa_1920s_%288723311651%29.jpg)
File:QRS "Red Top" Super Detector-Type Radio Tube By QRS Music Co., Circa 1920s (8723311651).jpg - Wikimedia Commons
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JCM | Free Full-Text | Augmentation of Electrocardiographic QRS R-Amplitude Precedes Radiocontrast-Induced Hypotension during Mobile Computed Tomography Scanning
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QRS Retail Ltd on Twitter: "To Make Your Mind More Pleasurable With #Philips #Radio. Visit #QRS. https://t.co/stl6rKAowD" / Twitter
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August 2nd Podcast: Sportsman Of Colorado Radio Show new 1-2 p.m. time slot on 560AM KLZ – Drive Radio/John Rush – QRS Outdoor Specialties – Sportsman of Colorado
![QRS Retail Ltd on Twitter: "To Make Your Mind More Pleasurable With #Philips #Radio. Visit #QRS. https://t.co/stl6rKAowD" / Twitter QRS Retail Ltd on Twitter: "To Make Your Mind More Pleasurable With #Philips #Radio. Visit #QRS. https://t.co/stl6rKAowD" / Twitter](https://pbs.twimg.com/media/EPce82BU4AEnxI3.jpg)