顶面cone tosurface: 圆锥形跟; 楦锥体顶面tosurface of the basement: 基底顶面tosurface porosity: 上表面气孔(铸孔)cone tosurface outline: 锥体顶面周线tosurface of piston ring: 活塞环上平面下载手机词典可随时随地查词查翻译