Audible fire alarm OPZ-12 PKI-1 (Ivolga) (03).jpg
Georg Pik
en
Audible fire alarm OPZ 12 PKI 1 (Ivolga) (03), Piezoelectric buzzers, Fire alarm notification appliances
commons
ja
高圧火災警報器 OPZ 12 PKI 1
commons_translated
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