It is the root circle of the external spline or the inside circle (tooth tip circle) of the internal spline.
它是外花键的齿根圆，和内花键的内圆(齿顶圆)。
It is the outside circle (tooth tip circle) of the external spline or the root circle of the internal spline.
它是外花键的外圆(齿顶圆)，和内花键的齿根圆。
This circle along with the tooth tip circle (or start of chamfer circle) determines the limits of tooth profile requiring control.
渐开线终止圆与齿顶圆（或者修缘线的起点所在的圆）共同限制了所要求控制的渐开线齿廓的范围。
TIP: in the properties view, properties that have been modified are indicated by a blue circle (see figure 6).
提示：在Properties视图中，已经修改的属性由蓝色的圆表示(参见图6)。
Tip: If you have a larger number of friends who want celebrate with you, plan a trip to the bar after an intimate dinner with your closest circle of friends.
小贴士：如果有很多朋友想和你一起庆祝，在和你最亲密的朋友聚完后可以去酒吧聚会。
Tip: If you have a larger number of friends who want celebrate with you, plan a trip to the bar after an intimate dinner with your closest circle of friends.
小贴士：如果有很多朋友想和你一起庆祝，在和你最亲密的朋友聚完后可以去酒吧聚会。
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