请教尺寸参数符号

关系式中的尺寸参数我只知道下列几种:
d#-----零件尺寸
d#.#------装配模式下的尺寸
rd#------参考尺寸
sd#------草绘尺寸
可是我在有些图中看到"kd#",如下图,不知道代表什么尺寸,是如何标注出来的?诚心请教,谢谢。

截面中的已知尺寸！
标注方法跟一般尺寸标注方法一样！比方你图中截面中的两个轨迹点选中即可标注！

Dimension symbols—The following dimension symbol types are supported:

d#—Dimensions in Part or Assembly mode.

d#:#—Dimensions in Assembly mode. The Session ID of the assembly or component is added as a suffix.

rd#—Reference dimensions in part or top-level assembly.

rd#:#—Reference dimensions in Assembly mode. The session ID of assembly or component is added as a suffix.

rsd#—Reference dimensions in Sketcher (section).

kd#—Known dimensions (in parent part or assembly) in Sketcher (section).

Ad#—Driven dimensions in Part, Assembly, or Drawing mode.

呵呵，帮助文档里都有，自己多翻翻，你会发现里面有好多好东西

多谢二位热心斑竹！