The steering wheel rim has a flat lower edge.

方向盘的边缘有一个平坦的下边缘。

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The roll forming process and mould design of wheel rim are introduced.

分析了滚形轮辋的制造工艺，并提出了合理的成形工艺和模具结构。

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On the tire with an inner tube, the valve is mounted on the tube. On the tubeless tire, the valve is mounted on the wheel rim.

有内胎式轮胎气门是直接做在内胎上的，无内胎式轮胎的气门安装在轮毂上。

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The Storm posed a special challenge for RIM because the company's operating system had always been tailored to a keyboard and click-wheel or track-ball for navigation, rather than a touch screen.

WSJ: BlackBerry Storm Is Off To Bit of a Bumpy Start