micrometer collar
(1)千公尺套圈
(2)微米轴环

• laser enrichment
• laser entertainment equipment
• laser enxtensometer
• laser equipment for printing
• laser etalon
• laser evaporation and deposition
• laser exciation
• laser exciter
• laser extension meter
• laser eye protection
• Laser eyewear
• laser facsimile printing
• laser facsimiles
• Laser fiber-optic transmission system
• laser fingerprint detectors
• laser flow cyto meters
• laser flowmeter
• laser focal shift monitor
• laser focusing system
• Laser footprint
• laser frequency
• deka-
• dekatron
• delary crystal
• delary distortion