SCIENCE AND TECHNOLOGY ENGLIAH FOR MECHANICAL ENGINEERING (cThe degree of coincidence of the real parameters obtained after a part is manufactured, with the parameters defined in part design, represents the manufacturing quality of the part. For the convenience of anal ysis, the degree of coincidence between the real macro-geometrical parameters(dimension, shape and coordination) of a part obtained after machining, and those specified in part design is defined as machining accuracy. The degree of coincidence between the real micro-geometrical parameters(surface finish)and the parameters of the physic-mechanical properties of part surfaces, obtained after machining a part, with those specified in part design is defined as sur face quality Other physical and chemical parameters are involved only in some special casesSCIENCE AND TECHNOLOGY ENGLISH FOR MECHANICAL ENGINEERING (c)The degree of coincidence of the real parameters obtained after a part is manufactured, with the parameters defined in part design, represents the manufacturing quality of the part. For the convenience of analysis, the degree of coincidence between the real macro-geometrical parameters (dimension, shape and coordination) of a part obtained after machining, and those specified in part design is defined as machining accuracy. The degree of coincidence between the real micro-geometrical parameters (surface finish) and the parameters of the physic-mechanical properties of part surfaces, obtained after machining a part, with those specified in part design is defined as surface quality. Other physical and chemical parameters are involved only in some special cases