A primary analysis for cutting force of the tools and the frictional force in rotating seal ring are also given.

切削刀具的切削力及密封圈回转摩擦力的初步分析计算。

youdao

Our primary objective is to seal our return to the top flight, but there's still a long way to go.

我们的第一目标是回到榜首，但这仍然有很长的一段路要走。

youdao

Given the two red flags that had been thrown up previously, one would have expected that as a precaution a cement plug would have been placed somewhere in the wellbore as a secondary pressure seal before this primary pressure control system (heavy mud) was evacuated from the wellbore.

WSJ: The Oil Disaster Is About Human, Not System, Failure