1.冲击电动扳手：主要是初紧螺栓的，它的操作简单，就是对准螺栓扳动电源开关就行。
1. Impact electric wrench: mainly used for initial tightening of bolts, its operation is simple, which is to align the bolt and pull the power switch.
2.电动扭剪扳手：主要是终紧扭剪型高强螺栓的，它的使用就是对准螺栓扳动电源开关，直到把扭剪型高强螺栓的梅花头打断为止。
2. Electric shear wrench: mainly used for final tightening of shear type high-strength bolts. Its use is to align the bolt and pull the power switch until the plum blossom head of the shear type high-strength bolt is broken.
3.电动定扭矩扳手：既可初紧又可终紧，它的使用是先调节扭矩，再紧固螺栓。
3. Electric fixed torque wrench: It can be used for both initial and final tightening. Its use involves adjusting the torque first and then tightening the bolts.
4.电动转角扳手：主要也属于定扭矩扳手的一种，它的使用是先调节旋转度数，再紧固螺栓。
4. Electric angle wrench: It mainly belongs to a type of fixed torque wrench, which is used to adjust the rotation degree first and then tighten the bolt.
5.电动角向扳手：是一种专门紧固钢架夹角部位螺栓的电动扳手，它的使用和电动扭剪扳手原理一样。
5. Electric angle wrench: It is a type of electric wrench specifically used to tighten bolts at the angle of the steel frame, and its use is the same as that of an electric torsion wrench.
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