To achieve uniform joint load/stress distribution, the bolts shall be tightened in three stages, representing 50%, 80% and 100%, of the torque value.

• 为了使接头处的荷载/承压的分布达到同样的水平，应采取三个步骤来紧固螺栓：转矩值表现为50%25,80%25和100%25。