service line
service line是什么意思、service line怎么读
发球界线\n【化】 动力管线
service line汉语翻译
发球界线<br>【化】 动力管线
service line英语解释
名词 service line:
- the back line bounding each end of a tennis or handball court; when serving the server must not step over this line同义词：baseline