装配面距离apex: n. (pl. apexes , apices ) 1. ...back: n. 1.背,背部;背脊;背面,反面;背后,后部,后面, ...pitch apex to back: 节锥顶至安装端面root apex to back: 根锥顶至安装基准面距离apex-apex: 胸距下载手机词典可随时随地查词查翻译