| 摘要 |
An electroacoustic transducer is encased in a unitary housing, preferably machined from a single block of material, which is chemically inert, sound conducting, and sealed against moisture seepage when the transducer is immersed, under high pressure, in a hot chemical. The transducer is for immersion, as a production control sensor, in a hot corrosive fluid being chemically processed under high pressure.
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