【Knowles Acoustics】BS 1740,BUZZER BALANCED-ARMATURE BEEPER
【BOPLA】BS 400 DI-D-1003,
【BOPLA】BS 400 DI-D-3001,
【BOPLA】BS 400 DI-D-5005,
【BOPLA】BS 400 DI-D-6032,
【BOPLA】BS 400 DI-D-7024,
【BOPLA】BS 403 DIS-7024,
【BOPLA】BS 403 DIS-7035,
