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培训教材目录第一章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································...