"piezoelectric crystal"@en-us . "0"^^ . . . . . "piezoelectric crystal"^^ . . "a crystal that can be used as a transducer"@en-us . "0"^^ . "103786449"@en-us . "03934780-n"^^ . . "103934780"^^ . . . "103121450"@en-us . . . .