Signalizatorhoyi bo andoza, avtomatik, masofaviy andoza bo daraja havo, suyu boshqa modda, ki dar tankhoyi muhr shuda qaror dade shuda andoza karda shuda ast. Asas bo kar kardan signalizatorhoyi bo o'zgarish energiya ultratovushiy osil, ki az havo yoki gaz, ba sababi andoza akustik muqobilya inji modda.
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