单词	course carder
释义	course carder 课程载体
随便看	data link configuration data link connection data link connection identifica-tion data link connection identifier Data Link Connection Identifier LT data link connection indentifier data link connector data link control data link control bootstrapping data link control character data link controlDLC data link control field data link control layer data link control layer protocol data link controller data link control management interface data link control procedure data link control protocol data link control standard data link control unit data link coordination net data link delay data link ecape character data link encryption data link encryptor