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.
这种优化方法对工程技术人员设计实现近似直线运动的四杆机构有指导意义。
An example of optimization using the above method was given. It is instructive for the engineering technicians to design the four-bar linkage with realization of approximate straight movement.
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