Marcus Lenier Gibbs

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Speed up your calculations with this double handed calculator. Use two thumbs with ease. -Background Customizable -Random Number Generator -CountDown …

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This app is designed to help technicians pass the EPA certification exam. This app is well worth its price. HVAC professionals and future technicians …

This is a pressure temperature conversion app for three commonly used refrigerants in the HVAC industry. We also have an app that will help you study …