短語(yǔ)詞組短語(yǔ)concave reflecting mirror 凹麪反射鏡concave spherical mirror [光]凹球麪鏡cylindrical concave mirror 柱麪凹鏡;柱形凹鏡a concave mirror 凹鏡concave mirror reflector 凹麪反光鏡concave mirror focus 凹麪鏡聚焦concave spherical reflecting mirror 凹球麪反射鏡plano -concave mirror 平凹雙麪反光鏡the shape of concave mirror 凹麪鏡形狀 返回 concave mirror