Pull-hook 左手球员击球时球飞向目标线的左侧
front pull hook 前牵引钩
push-pull hook 推拉钩
front pull hook group 前牵引钩组件
pull hook traction 挂钩牵引力
pull-down hook 大型破拆钩
pull-out hook 抬圈钩
"The organization doesn't have to expose its inner-most secrets to pull in somebody from New York and say here's how to hook up some propane tanks."
VOA: standard.2010.05.18
You hook one end of the spring to a wall and you pull it from rest by some amount and you attach the one kilogram mass to it.
你把弹簧的一端固定在墙上,然后拉伸一段距离,接着你把 1 千克物体固定在上面
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