waist-level viewing finder
俯视式取景器

• laser trimming
• Laser-trimming
• laser tube
• laser tubes and bores
• laser underwater comunication
• laser vaporization
• laser vector velocimeter
• laser velocimeter
• laser velocimetry
• laservessel
• laser vibration probe
• laser videodisk system
• laser voice link
• laser watch-dog
• laser waveform generator
• laser weapon
• Laser welder
• laser welding
• laser-welding machine
• laser window
• laser with strip geometry
• laser zenith meter
• lash system
• lasing
• lasing ability