结合煤炭行业液压支架主体机构的设计，介绍了几种近似直线机构的简易设计方法。
According to the body mechanism design of power supports in coal business, this paper introduces some simple design methods of approximate straight line mechanism.
支架主体（1）的上端连接有 颊侧面固定翼（2），支架主体（1）的下端连接有下颌骨固定翼（3）。
The upper end of the bracket body (1) is connected with a cheek side fixed wing (2), and the lower end of the bracket body (1) is connected with a mandible fixed wing (3).
照片的主体是落满灰尘的三只支架之一，支架，能帮助飞船顺利着落岩石遍布，及其干燥的火星表面。
The photo shows one of three dust-covered footpads of the craft resting on Mars's dry, rock-littered surface.
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