机械图纸中常见的符号及意义(中英文)

直度-一个条件，一个面元素或轴是一条直线。 Straightness - a condition where an element of a surface or an axis is a straight line. 平整度-是条件，表面有所有的元素在一个平面。 Flatness - is the condition of a surface having all elements in one plane. 圆度-描述条件对革命的表面（圆柱，圆锥，球）在所有点的表面相交的任何飞机。 Roundness - describes the condition on a surface of revolution (cylinder, cone, sphere) where all points of the surface intersected by any plane. 圆柱度-描述了一个条件的旋转面，使所有的点面距离相等，一个共同的旋转轴。 Cylindricity - describes a condition of a surface of revolution in which all points of a surface are equidistant from a common axis. 线轮廓度-是条件允许量相同的剖面变化，醚单边或双边，沿着一条线元素的特征。 Profile of a Line - is the condition permitting a uniform amount of profile variation, ether unilaterally or bilaterally, along a line element of a feature. 面轮廓度-是条件允许量相同的剖面变化，醚单边或双边，上表面。Profile of a Surface - is the condition permitting a uniform amount of profile variation, ether unilaterally or bilaterally, on a surface. 周围标志-表明公差适用于所有周围的部分表面。 All Around Symbol - indicating that a tolerance applies to surfaces all around the part 倾斜度-是表面，轴，或中线，这是从某一特定角度基准平面或轴。Angularity - is the condition of a surface, axis, or centerplane, which is at a specified angle from a datum plane or axis. 垂直度-条件是表面，轴，或线，这是90 度的基准平面或基准轴 Perpendicularity - is the condition of a surface, axis, or line, which is 90 deg. From a datum plane or a datum axis 平行度-一个表面，线，或轴，这是等距离的所有点，基准平面或轴。Parallelism - is the condition of a surface, line, or axis, which is equidistant at all points from a datum plane or axis. 位置...