service request line[计] 服务请求线;服务请求线英语
service brake line行车制动器管路
service air line维修空气管路
service e line发球线;发球界限
service agreement line服务协议行
service on line网络服务
flexible service andrefrigerant line柔性维修和冷媒管
service air line coupling维修空气管路连接器
Service First Line Answering标签
N（名词） in certain racket games the line at the back of the court behind which the server must stand when serving 发球线