input question: Fix spacing: Whathashappened,beeninvented,andbeenmadewidespreadinthelatestyearsrevolutionizeseverythingthatisknowninprevioushistory.

output answer: What has happened, been invented, and been made widespread in the latest years revolutionizes everything that is known in previous history.

input question: Fix spacing: Displaying37to48(of273products)

output answer: Displaying 37 to 48 (of 273 products)

input question: Fix spacing: Commonsoundsrarelyriseabove40dB.

output answer: Common sounds rarely rise above 40 dB.

input question: Fix spacing: SourceforLED-TUBEVedioTypemanufacturersatzhongshankarnarlighting&electronfactory.

output answer:
Source for LED-TUBE Vedio Type manufacturers at zhongshan karnar lighting & electron factory.