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| Brand | Biaozhuo |
|---|---|
| Origin | Shanghai, China |
| Model | JJ-2A |
| Measurement Range | 0°–360° |
| Angular Resolution | <1 arcsecond |
| Accuracy | <4 arcseconds |
| Base Material | Granite |
| Main Shaft Bearing | Dual-sphere rolling mechanism |
| Operating Temperature | 20 °C ±3 °C |
| Relative Humidity | 40–60 % RH |
| Mass | 350 kg |
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