When an EXPOSE signal is received to begain x-ray,backup contactors(K1 through K4)are turned on and power is applied to the bucky,if a bucky has been selected.是什么意思_When an EXPOSE signal is received to begain x-ray,backup contactors(K1 through K4)are turned on and power is applied to the bucky,if a bucky has been selected.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句