This article proves that rolling operation can largely enhance fatigue strength through the research on the cold rolling operation of thread root of the drilling tool joint.
通过石油井下钻具接头螺纹冷滚压工艺的研究可以证明冷滚压可大大地提高接头的疲劳强度。
This tracing starts with the root set, which consists of internal structures such as thread stacks and global references to objects.
这个跟踪以根集 开始，它由一些内部结构组成，比如线程栈和对象的全局引用。
The model needs to include a mechanism for passing root objects to each iteration that can be used to store and retrieve objects that have a lifetime of Retain Thread Group or Retain Thread.
模型需要包含一种机制，将根对象传递给用于存储和检索生存期为Retain Thread Group或Retain Thread的对象的每个迭代。
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