flickspectrophotometer
(1)火石
(2)火石玻璃

• batter level
• battery
• battery chamber
• battery check lamp
• battery commander's telescope
• battery compartment
• battery lamp
• battery-powered
• battlefield laser rangefinder
• baud
• baume
• Baume scale
• bauxite
• bay
• bayonet base
• bayonet mount
• bayonet ring
• beacon
• beaconage
• beaconimagery
• beacon lamp
• beacon light beam
• beacons
• bead
• beaded screen