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crystal oscillator
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crystal oscillator
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crystal oscillator
晶体振荡器
用石英晶体和有源器件(如晶体管、运算放大器等)构成的正弦波发生器。
Computer
计算机硬件
计算机工程设计
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crystal oscillator
晶体振荡器
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water quality analysis
water quality and sampling
water quality assessment
water quality assessment of transboundary water section
water quality automatic monitoring system
water quality buoy
water quality detection
water quality evaluation
water quality forecasting
water quality for mariculture
water quality grade
water quality index
water quality investigation
water quality management
water quality model
water quality monitoring
water quality monitoring index
water quality monitoring method
water quality of lake
water quality of reservoir
water quality of river
water quality of waterbody
water quality of water supply
water quality protection measures
water quality sampling
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