typewriter with constant pitch的意思|示意

等间距打字机 ... 右边距 right margin; rightmargin 等间距打字机 typewriter with constant pitch 爱无边 love's tongue is in the eyes ...

固定间距打字机 typewriter with constant pitch ==> 固定间距打字机,等间距打字机 typewriter with exchangeable type elements ==> 打印部件可换式打字机,打印头可更换的打字机 .