male and female face

凸凹_百度百科 ... 凸凹地形 knob-and-basin topography 凸凹面 male and female face 凸凹透镜 meniscus ...

face up to ... magnet pole face 磁极面 male and female face 阴阳面; 凸凹面 metallic face 金属(表)面 ...

管道、钢结构、通风空调术语 - 豆丁网 ... 凸台面 raised face 凹凸面 male and female face 环连接面 ring joint face ...