作者: R Meyer
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摘要: A vibrating cylinder, which is electronically driven by a feedback amplifier in response to electromagnetic signals representing the vibrations thereof, completely surrounded vacuum and axially loaded, tension or compression, whereby natural frequency thereof varies as function of force axial loading. The loaded end cell sealed diaphragm. loading means connected diaphragm equal area, atmospheric pressure against loads direction oppositely first diaphragm, equally independent density effects. Thermostatic heating obviates temperature variations. embodiment includes hoop for compression comprises beam-type suspended-pan scale.