clear headclear heightfree height净空: headroom; freeboard; clearan ...高: tall; high净空高度: clearance height; free height; head room; head-room (overhead) clearance; headroom; headway; height of clearance; overhead clearance有限净空高: limited headway通行高度；净空；净空高度: headroom下载手机词典可随时随地查词查翻译
