Marble parallelism gauge is mainly used for detecting parallelism and perpendicularity. The main mineral components of marble parallel gauge are escape stone, plagioclase, a small amount of olivine, biotite, and trace magnetite. It has a black color and structure, and after billions of years of aging, its texture is uniform, stable, strong, and can be maintained under heavy loads. Granite measuring tools are suitable for industrial production and laboratory measurement work.

characteristic

1. Good rigidity,;

2. Marble, after long-term aging, has a uniform organizational structure, low coefficient of expansion, disappearance of internal stress, and no deformation, therefore;

3. Not afraid of acid and alkali erosion, will not rust, does not need to be oiled, is not easy to stick to dust, maintenance free, easy to maintain, and has a long service life;

4. Non magnetized, able to move smoothly during measurement, without any sense of stagnation, unaffected by moisture, and with stable flatness;

5. No scratches will occur, not hindered by constant temperature conditions, and measurement accuracy can be maintained at room temperature.

Marble parallel gauges should be supplied in pairs and used in pairs.