Use your hand to power the hoop in a back-and-forth motion: the hoop will alternate between hitting the center of your palm and the back of your hand.
用你的手来给呼啦圈前后移动的力：呼啦圈会在你的手掌心和手背上交替着力。
2
Through the design of bending die for the backhoop of silencer, die design analysis and die structure for large cylinder part considering springback compensation was introduced.
通过对消音器后环箍弯曲成形模的设计，介绍了考虑弹复补偿后，较大圆筒件成形模具的设计分析和模具结构。
3
About which designs for the force thick plate levels off the back pressure hoop group specially, May achieve the guarantee the stress relieving effect.