This paper introduces a board-reversing machine that consists of two four-rod mechanisms, According to the restraint conditions, the rod size of board-reversing machine is optimized.

介绍了一种由两组四杆机构组成的翻板机，用于薄板的翻面。根据约束条件要求，优化设计了翻板机的杆件尺寸。

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The craft they deployed was a wing-shaped rod the size of a bacterium.

他们设计的飞行器是一个细菌大小的翼状杆。

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Cylinder pistons are attached directly to each guide rod, conserving size without sacrificing output force.

气缸活塞直接连接到每个导杆，节约不牺牲输出力的大小。

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Just a few millionths of a millimetre in size, the minute machine resembles a ring threaded on a rod.

BBC: Tiny molecular machine apes cellular production line