电子厂员工质量培训教材基础培训教材第一节常用术语解释（一）··················································11．组装图···················································································12．轴向引线元件···········································································13．单端引线元件···········································································14．印刷电路板·············································································15．成品电路板··············································································16．单面板····················································································17．双面板····················································································18．层板·······················································································29．焊盘····················································································210．元件面·················································································211．焊接面·················································································212．元件符号············································································213．母板····················································································214．金属化孔（PTH）··································································215．连接孔·················································································216．极性元件··············································································217．极性标志···············································································218．导体··················································································219．绝缘体·····································...
