SDSL对称性数字用户环路技术
SDSL symmetric digital subscriber line technology
艾尔顿-马瑟环路测试法
Ayrton-Mother ring test method
安培环路定理
Ampere’s circulation theorem
Ampere’s circuital law
Ampere circuital theorem
Ampere circle theorem
按环路α-连对角占优阵
a-connective diagonal dominant matrix according to circuit
北京六环路
The Beijing sixth circle expressway
北京四环路
the fourth ring road in Beijing