The appearance of the cast iron platform should be standardized, serialized and generalized as much as possible to reduce the cost of the cast iron platform, and it is easy to use and manage.

1. Main structure and performance: The materials used for manufacturing should comply with the relevant standards and specifications issued by China or the Ministry of Commerce, and have a warranty certificate;

The square box is a hollow cube made of cast iron with 6 working faces. It is used for the inspection and marking of the parallelism and perpendicularity of the parts.

A right square is used for inspection, measurement, marking, equipment installation, and industrial engineering construction.

During the use of the cast iron platform, due to the action of force, the phenomenon that the size or shape of the cast iron platform changes is called deformation.

1. Use tools to check the size and geometry of parts: use various measuring tools (calipers, metal rulers, vernier calipers, centimeters, micrometers or dial indicators, dial indicators, plug gauges, gauge blocks, gear gauges, etc.)