. . . . . "a device for making a record of the wave forms of fluctuating voltages or currents"@en-us . "oscillograph"^^ . . "0"^^ . "103065254"@en-us . . "oscillograph"@en-us . . "103712108"@en-us . "103857687"^^ . "a device for making a record of the wave forms of fluctuating voltages or currents"@en-us . . "0"^^ . . "03857687-n"^^ .