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Chinese 
- 2-dimension tilt adjustment;
- Fine adjustment driven by fine adjustment screw thread pair,locking mechanism with special fine adjustment screw thread pair to ensure stable light path;
- Reset with tension spring made of imported material,extremely high stability,high hardness ceramic screw carrier rod,long service lofe;
- Stable ,safe and reliable,with lens fixed with pressing ring;
- 2-direction screw fixing holes for easy mounting.
