B-Surface is the surface of a component that you can't see in the normal service condition.
级表面是在正常使用状态下看不到的部件表面。
Finally, the operating system of the computer is re-started, so that the computer device will return to the normal service condition.
启动该电脑装置的作业系统，使该电脑装置回复至正常使用状态。
The design service life is based on the precondition of G-L Layer failure not occur, on the normal condition of balanced operation and routine maintenance.
设计使用寿命是指在正常平稳操作及正常维护条件下，基于搪瓷层没有产生失效的这一前提下所确定的容器使用寿命。
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