鍛造圖紙中的符號（二）

Position Tolerance - defines a zone within which the axis or center plane of a feature is permitted to vary from true (theoretically exact) position.

—位置公差:定義一個區域內的軸或中心平面的一個特點是允許不同的真正的(理論上)位置

Concentricity - describes a condition in which two or more features , in any combination, have a common axis.

—同心度:描述在其中一個條件的2個或更多的功能，在任何組合，有一個共同的旋轉軸

Symmetry - is a condition in which a feature (or features) is symmetrically disposed about the center plane of a datum feature.

—對稱度:是一種狀況，其中一個功能（或功能）是處理有關對稱中心平面基準特征

Runout - is the composite deviation from the desired form of a part surface of revolution through on full rotation (360 deg) of the part on a datum axis.

—跳動:是復合偏離理想形式的一部分表面上通過革命旋轉（360度）的一部分，在基準軸

Total Runout - is the simultaneous composite control of all elements of a surface at all circular and profile measuring positions as the part is rotated through 360.

—全跳動:是同時復合控制所有表面元素在所有圓輪廓測量位置的部分是通過旋轉360

Maximum Material Condition (MMC) - is that condition of a part feature wherein it contains the maximum amount of
material within the stated limits of size. That is: minimum hole size and maximum shaft size.

—材料狀態:是條件的一部分功能其中包含的金額材料在規定的極限尺寸。那就是：最小孔尺寸和軸尺寸

Least Material Condition (LMC) - implies that condition of a part feature of size wherein it contains the least (minimum) amount of material, examples, largest hole size and smallest shaft size. It is opposite to maximum material condition.

—最小材料狀態:意味著條件的一部分功能的大小，其中也包含了最小（）的材料，例子，孔尺寸和最小軸徑。它的對面是材料狀態。

Regardless Of Feature Size (RFS) - the condition where the tolerance of form, runout or location must be met irrespective of where the feature lies within its size tolerance.

—不論大小的特征:不論大小的特征的情況下，形狀公差，跳動或位置必須滿足，不論在哪里，它的特點是在其尺寸公差