ball arm

常见例句

With a roll ball rocking arm and balance tray. It is a smart design and convenient to be installed quickly.
备有流滚珠式驻持摇臂及平衡托架，设计巧妙，安装简便，快捷。
Award a penalty kick: there is no such thing as 'ball to arm' in this situation: the player must take the consequences of his actions.
判罚点球。这不是一个所谓的“球打手”的状况，所以这名后卫只能对他自己的行为自食其果。
The invention is characterized in that the cabin storing ball arm is turned to place corresponding to import and export of tubular bag, which is convenient for users to choose;
其优点是，把存放所需球杆的舱位转到与筒形袋体的进出口对应的位置，方便使用者选取；
ip.com

And I stuck out my hand and the ball bent my arm back.
WHITEHOUSE: Take Our Daughters and Sons to Work Day 2012
To use an apt football analogy, just a month ago George Allen was in the open field gliding towards the end zone with the ball under his arm and a smile on his face.
NPR: Allen's Miscues Make for Close Race in Virginia