| 摘要 |
measuring devices for ultrasonic flowmeters. SUBSTANCE: piezoelectric transducer that may be used for measuring flowrate of liquid media in space-rocket- equipment has case, piezoid, protector, and silver moderator placed between piezoid and protector. Moderator thickness is 20-40 mm and its diameter is chosen to be intermediate between protector and piezoid diameters. EFFECT: enlarged operating temperature range. 1 dwg
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