light-emitting diode coupler
发光二极体偶合器

• orhtgraphic camera
• orhtogonal axis
• orhtogonal linear polarizaiton
• orhtogonal tansformation
• orientating instrument
• orientation
• orientation effect
• orientation polarizability
• orientation polarization
• orifice
• origin
• original
• original position
• original state
• origination
• O-ring
• oringinal aratwork
• OR-NOT
• ortating mirror framing camera
• orthicon
• orthicon camera system
• ortho-acid
• ortho-axis
• orthocentre
• orthochromatic