57X 规格参数
| Bulb Style | b9 g |
| Bulb Light Transmission Characteristic | transparent |
| Filament Designation | c-2f |
| Emitted Light Characteristic | colorless |
| Voltage Rating | 14.000 volts nominal |
| Bulb Designator | g-4 1/2 |
| Overall Length | 1.062 inches maximum |
| Burning Position | any acceptable |
| Rated Average Life | hours |
| Light Output Rating | 2.000 spherical candlepower nominal single rating |
| Light Center Length | 0.562 inches nominal |
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