Resonant frequency: 2.9±0.5kHz Resonant impedance: ≤300Ω Brass plate diameter: 35±0.2mm Ceramic disc diameter: 25±0.5mm Brass plate thickness: 0.30±0.
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Resonant frequency: 7.8±0.8kHz Resonant impedance: ≤300Ω Brass plate diameter: 12.5 +0/-0.1mm Ceramic disc diameter: 9.5±0.2mm Brass plate thickness:
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Resonant frequency: 6.0±0.5kHz Resonant impedance: ≤300Ω Brass plate diameter: 15±0.2mm Ceramic disc diameter: 11±0.5mm Brass plate thickness: 0.10±0.
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Resonant frequency: 4.0±0.5kHz Resonant impedance: ≤300Ω Brass plate diameter: 20±0.2mm Ceramic disc diameter: 15±0.5mm Brass plate thickness: 0.14±0.
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Resonant frequency: 4.7±0.5kHz Resonant impedance: ≤300Ω Brass plate diameter: 17±0.2mm Ceramic disc diameter: 12±0.5mm Brass plate thickness: 0.10±0.
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Resonant frequency: 1.8±1kHz Resonant impedance: ≤300Ω Brass plate diameter: 31±0.2mm Ceramic disc diameter: 20±0.5mm Brass plate thickness: 0.10±0.02
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Resonant frequency: 9.0±1kHz Resonant impedance: ≤300Ω Brass plate diameter: 12±0.2mm Ceramic disc diameter: 9±0.5mm Brass plate thickness: 0.10±0.02m
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Resonant frequency: 9.0±1kHz Resonant impedance: ≤500Ω Brass plate diameter: 15±0.2mm Ceramic disc diameter: 8±0.5mm Brass plate thickness: 10.5±0.2mm
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