[网络] 最小离地间隙 minimum clearance: 最小缝隙; 最小间隙; 最小净空; 最小余隙under clearance: 桥下净空; 下部间隙minimum clearance distance: 最小安全距离minimum ground clearance: 最小离地间隙minimum obstacle clearance: 越障最低安全高度下载手机词典可随时随地查词查翻译