Ulbricht integrating photometer
乌布利希积分光度计

• in-site measurement
• insolation
• insolubility
• inspecting microscope
• inspection glass
• Inspection mirror
• inspection of optical crystal
• inspection thermometer
• inspectro
• insrument bord
• instability
• instability therory
• installation
• installation diagram
• installation microscope
• instant
• instantaneity
• instantaneous amplitude
• instantaneous exposure
• instantaneous image
• instantaneous position
• instantaneous power
• instantaneous value
• instanteanous error measurement
• instant photography