unsetting

In order to prevent failure of packer and provide theoretical basis for selection of unsetting shear pin, the unsetting force of packer must he calculated in design.

为了防止封隔器在工作过程中失效，并为解封（环）的选择提供理论依据，必须进行解封力的设计计算。

But investigators in the Rocky Mountains have unsetting(颠覆) evidence that an excess of fixed nitrogen coming in from the atmosphere may be upsetting all that.

是调查人员在落基山脉有个颠覆性的发现：那的大气层有过量的氮。