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Mechanical instruments. Refers to the instrument used to achieve the original signal conversion by mechanical methods. Such as vernier calipers, micrometers, dial gauges, various types of mechanical micrometers, mechanical universal tooth measuring instruments, and various mechanical calibrators.
Carbon steel is referred to as carbon steel. In addition to Fe and C elements, carbon steel also contains a small amount of Mn, and other elements (Si, S, P) are present as impurities. There are many classification methods for carbon steel. The main classification methods are as follows:
90 ° square ruler, (taken from GB / T6092-1985)
Commonly used grades, properties and uses of cast iron, (1) grades, properties and uses of gray cast iron (GB, 9439-1988), (2) grades, properties and uses of malleable cast iron (GB, 9440-1988),
Steel ruler and rock ruler (Steel, and, granite, straight, edges) <BR>, JB / T, 7978-1999 <BR>, 1 ,, range <BR>, this standard specifies
The knife-edge ruler uses the light gap method to measure the straightness and flatness of the workpiece. The light gap method can also be used to compare the measured part with the standard part to measure the workpiece size. Knife-edge ruler is divided into knife-edge ruler, triangular ruler and quadrangular ruler according to its structure.
Casting nonferrous alloys [casting non-ferrous alloys] ,,, nonferrous, cast, alloy ,,, iron elements are not used as matrix elements, but are foundry alloys that exist as alloying elements or impurities. Includes: Cast aluminum alloy
Acid-resistant cast iron ,,, acid, resisting, cast, iron ,,, cast iron with excellent resistance to acid corrosion. Such as high silicon acid-resistant cast iron. <BR> ,, Dense cast iron ,,, Meehanite, ca
Cast iron ,,, cast, iron ,,, undergoes a eutectic transformation during the solidification process, a general term for iron-based alloys used to produce castings. In these alloys, the carbon equivalent exceeds the amount at which the carbon remains in the austenite solid solution at the eutectic temperature.
3.2.1 ,, cast steel, cast, steel ,,, a general term for iron-based alloys used in the production of castings that do not undergo eutectic transformation during the solidification process. Divided into cast carbon steel and cast alloy steel. , <BR>,
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