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，并为解封剪钉（或剪环）的选择提供理论依据，必须进行解封力的设计计算。
Shear pin
英语例句库
英语百科
Shear pin
A shear pin is a mechanical detail designed to allow a specific outcome to occur once a predetermined force is applied. It can either function as a safeguard designed to break to protect other parts, or as a conditional operator that will not allow a mechanical device to operate until the correct force is applied.
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