短语词组短语logical l line 逻辑行;合理路线Logical Line Control 逻辑链路控制logical line end symbol 逻辑列结束符号;逻辑行结束符logical line delete symbol 逻辑行删除符logical line group 逻辑线路组;逻辑列组LLG Logical Line Group 逻辑线路组logical line end 逻辑行结束 返回 logical line