Notice that in System V semaphores, key is used to uniquely identify the semaphore; in Windows, the semaphore is identified by a name.
注意，在System v信号量中，key被用来惟一标识信号量；在Windows中，信号量是使用一个名称来标识的。
V. Preliminary work: the feasibility study has been finished; the Project has passed the review since 2012 and been listed in 2013 key construction projects of Fujian Province.
项目前期工作进展情况：已完成可研，2012年已立项，已列入2013年福建省重点建设项目。
The key problems of 3d FEM simulation on internal rolling process of V shaped connecting tubes were studied in this paper.
本文主要对V型连接管件内径滚压成形三维有限元模拟中的关键问题进行了研究。
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