Rolling material support ball is set, to minimize fish tail with sheet bar and to reduce frictional resistance.

滚动托料球，减少板料划伤，并可减少摩擦阻力。

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If your foot feels tense, stand with one hand on a wall for support and place the arch of one foot on top of the ball.

如果你的脚很紧张，一只手倒站在墙面支撑着把一只脚放在球上形成一个拱门。

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It will place both arms on a table to maintain its balance when trying to sit down in a chair, or use one arm for support when taking a big swinging kick at a ball.

它坐在椅子时会把双手扶住桌子以保持自己平衡，或用力踢一个球时会用一个手扶住物体来支承。

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While Wales' two 22-year-old breakaways, Dan Lydiate and Sam Warburton, could not quite match the All Blacks pair's support and ball-carrying, they did put in hugely impressive shifts at the breakdown.

BBC: Winless Wales still pack punch

Indeed, it's the support at the ball of the foot that gave my pair their distinct feel.

FORBES: The Sole of Stefano Bemer

McCaw was in support to ensure quick ball and the All Blacks swept left for Gear to squeeze in at the flag despite George North's tackle.

BBC: Wales 25-37 New Zealand