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声校准器
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声校准器
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电声计量
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sound calibrator
声校准器
当声校准器耦合到规定型号和结构的传声器上时,能产生规定声压级和规定频率的正弦声压的计量器具。
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regular subdivision
regular subgroup
regular submanifold
regular submartingale
regular subset
regular subspace
regular summability
regular summation method
regular support
regular surface
regular system
regular system of constraints
regular system of parameters
regular tessellation
regular tetradecagon
regular tetrahedron
regular tetrahedron group
regular topological space
regular topology
regular torus
regular trace
regular transformation
regular tree group planting
regular triangle
regular tridecagon
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