Process of rolling forming from both side of disk type parts has been studied with analysis of forces applied to rolling head and each contacting zone on billet.

研究了盘型件双面辗压成形过程，分析了辗压头与坯料各接触区域受力状态。

youdao

Bend your knees and duck down, rolling your head in a 'U'shape under the punch from 'inside' to 'out.

BBC: DEFENCE

Bill Belichick, wearing a Trinity Lacrosse shirt, rolling his head in circles in what looked to be a set of very disciplined neck exercises.

WSJ: NFL Combine: Football Is Back! (Wait: Already?)��Jason Gay

Lagarde, however, went beyond eye rolling and head shaking.

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