Submarine signaling device covered with waterproof vibration damping shield
作者： Edwin C Ballentine , James V O'neill , Clifford W Mell
DOI:
关键词:
摘要: This invention relates to signal translating devices,: and more particularly electro-acoustic transducers useful in underwater signalling. Signal devices of this type usually include a steel casing open at one end closed s off by vibratile diaphragm, the casing...
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