non-self-luminous object
非自发光物体

• brake
• brake cross lever
• brake shoe
• braking radiation
• branch circuit
• branching
• branch order
• brass
• brass-covered
• brass gage
• brass ga[u]ge
• brass strip
• Braun tube
• Bravais-Miller Index
• Bravis system
• brazing
• bread board
• breadth of spectral line
• breakage
• break-before-make
• breakdown
• breakdown voltage
• breaker
• breakeven point
• breaking strength