offset printing 与 4 color printing一样吗?

offset printing 与 4 color printing一样吗? offset printing是什么意思 sheet-feed offset printing、啥意思 printing colors：full color +1 color Beijing Full Color Printing& Packaging Service Factory pearlite printing screen printing quadric printing 请问谁能告诉我：photo print or offset printing on fabric 英语被动式 介词Printing was invented in China . printing前有必要加冠词吗? i flexo printing是什么意思 silk screen printing是什么意思