crossed Nicol's prism
正交尼科耳淩镜

• plane-table alidade
• plane-table survey
• planetarium
• planetarium projector
• planetary
• planetary mission
• planetary pinion
• planetary radiation
• planetray microfilmer
• planetray reducer
• plane wave
• plane wave front
• planigraphy
• planimegraph
• planimeter
• planimetry
• planitron
• planizer
• plank
• plano-aspheric corrector
• plano-aspheric transmitting corrector
• plano-concave lens
• plano-convcave
• plano-convex
• plano-convex lens