镜4只是一块平面镜,就象牛顿式望远镜的副镜一样,方便观测。
At present, goggles myopic lens into the surface of the mirror and asperity absolutely flat mirror the two major types.目前近视泳镜的镜片分为表面微凸镜面和绝对平面镜面两大类型。
Inner flat mirror face of stainless steel weld pipe of Hongyun is famous for precise size, property, surface sanitation and high precision.“鸿运”不锈钢内整平镜面焊管以尺寸精良、性能、表面卫生精度高而著称。