A printer that forms dot matrix characters by means of linear,ridged print hammers that impact paper and ribbon against a helical ridge on a rotating cylinder.是什么意思_A printer that forms dot matrix characters by means of linear,ridged print hammers that impact paper and ribbon against a helical ridge on a rotating cylinder.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句