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layer 1
comp., net. 层1
multimed. 记录层 1
telecom. OSI 参考模型; CCITT X.25 第一层; 物理层过去曾称为 level 1; OSI 参考模型;CCITT X.25第一层; 物理层
layer 1: 4 phrases in 3 subjects
Agriculture1
Computer networks1
Telecommunications2