The Specification Of The Use Ruler
I-shaped ruler, also known as cast iron ruler, flat ruler, parallel flat ruler, cast iron parallel ruler, ruler, cast iron ruler, level ruler, cast iron level ruler, type flat ruler; Ruler, granite flat ruler, marble flat ruler.
I-ruler has a precise plane ruler. Flat ruler used to coloring, indicating the table test flatness, long guideways, etc., is also commonly used to test the edge of the workpiece by the light gap straightness. Made of high-quality cast iron, rectangular flat ruler is also useful for bearing steel or granite.Long-size face can not seriously affect the appearance and performance of the sand holes, pores, cracks, slag, shrinkage, scratches, bumps , Rust spots, etc. Flat feet should be made of high-quality fine gray iron or alloy cast iron and other materials, the hardness of the face should be 170 ~ 220HB.
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