Free Vias (a.k.a. stitching Vias) - PowerPCB now has the capability to add free vias on the fly to a printed circuit board.是什么意思_Free Vias (a.k.a. stitching Vias) - PowerPCB now has the capability to add free vias on the fly to a printed circuit board.在线翻译_英语_读音_用法_例句