SMNHYSYN3: 'PCB阻抗计算参数说明', 《百度文库 HTTP://WENKU.BAIDU.COM/LINK?URL=K_BW6EOEU9F0MHJEJJGZOY3WI5YWNTGUYXOC9RSRYQZIJ1RO4HJEA_MKP9YY_YUEGAB0OOJA30H3OZJ1Q9WG0SP3I7MAH7LU7-DJEYYIRAK》, 22 September 2012 (2012-09-22)