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The tetrahedral ruler ЛД-225 (angle 90 °) is used to control the straightness and plane in the light. The dimensions of this line are 225x20mm
The tetrahedral ruler ЛД-225 (angle 90 °) is used to control the straightness and plane in the light. The dimensions of this line are 225x20mm. It is possible to manufacture custom-made rulers. All tetrahedral ЛД lines undergo 100% metrological control and calibration ISO 17025: 2017.