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脉宽调制
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脉宽调制
pulse-width modulation impulse-width modulation pulse-duration modulation (PDM)
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ultrasound cardiogram
ultrasound computerized tomography
ultrasound diathermy
ultrasound Doppler's method
ultrasound emitting crystal
ultrasound excitation
ultrasound injury
ultrasound medicine
ultrasound pattern
ultrasound stimulation
ultrasound therapy
ultrasound therapy equipment
ultrasound tomogram
ultra sound tomogram of heart
ultrasound transmitting transducer
ultraspatial element
ultraspectrophotometry
ultraspeed
ultra-speed centrifuge
ultra speed streak camera
ultra-speed welding
ultraspherical function
ultraspherical polynomial
ultrastability
ultrastable system
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