EntityQ1440593· pop 8· linked from 40 articleshydrogen maserSign in to savetype of maserConnectionshydrogenEntityAmsterdamEntityInternational Standard Book NumberEntitydigital object identifierEntityquartzEntityhertzEntityCharles Hard TownesEntityspinEntityLibrary of Congress Control NumberEntityTheodor W. HänschEntityNorman Foster RamseyEntitybibcodeEntitypolytetrafluoroethyleneEntityGalileoEntityZeeman effectEntitymaserEntityBeiDouEntityNational Institute of Standards and TechnologyEntityhydrogen atomEntitycollimatorEntityCategoriesAtomic clocksElectronics standardsHydrogen technologiesLaser applications