精密机械加工的工艺效果是：

　　The effect of precision machining is:

　　①零件的几何形状和相互位置精度达到微米或角秒级;

　　(1) the accuracy of parts geometry and position is up to micron or sec.

　　②零件的界限或特征尺寸公差在微米以下;

　　2. The tolerance of parts or dimensions is below microns.

　　③零件表面微观不平度(表面不平度平均高度差)小于0.1 微米;

　　(3) the surface roughness (the average height difference of surface roughness) is less than 0.1 microns.

　　④互配件能满足配合力的要求;

　　4. Mutual accessories can meet the requirements of combining ability.

　　⑤部分零件还能满足准确的力学或其他物理特性要求;

　　Some parts can also meet the requirements of precise mechanics or other physical properties.