bulb blackening造句
例句与造句
- This greatly accelerates the bulb blackening, in comparison with evaporation-only.
- In 1913, Irving Langmuir found that filling a lamp with inert gas instead of a vacuum resulted in twice the luminous efficacy and reduction of bulb blackening.
- It's difficult to find bulb blackening in a sentence. 用bulb blackening造句挺难的