外部链接:
英德
有道
百度
谷歌
图片
维基
百科
beam diaphragm
束光阑
beam diaphragm
beam direction
beam direction factor
beam direction inaicator
beam directional stab...
beam directionality
beam directive transm...
beam displacement
beam divergence
beam divergence angle
beam diverging
beam diversity
beam divider
beam doffer
beam dosimetry
beam draft ratio
beam drill
beam droop
beam drop
beam drying machine
beam dump
beam duty cycle
beam dyeing
beam dyeing machine
beam dynamics
beam effect
beam efficiency
beam electronic current
beam element
beam emittance
beam end
beam energy
beam energy control
beam engine
beam engine pump
beam envelope
beam equation
beam error
beam escape
beam evening device
beam expandar
beam expander
beam extraction
beam extractor
beam fill
beam filling
beam filling factor
beam finder
beam fixed at one end
beam flux
beam flying
beam focus
beam focusing
beam focusing voltage
beam for exterior wall
beam form
beam forming
beam forming cathode
beam forming electrode
beam forming optics
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