第二章由以产品设计的体验性认识为基础，论述其在历史的渊源，从纵向进行分析比较。
Second chapter by take the product design experience understanding as foundation, elaborates it in the historical origin, from longitudinal carries on the analysis comparison.
全文从纵向阐述和横向比较角度出发，主要运用了调查法、音乐本体研究法、比较研究方法等。
From the point of view of the vertical and horizontal comparison explain, the methods of study in this thesis are, music body, compare etc.
从纵向堆垛稳定、横向堆垛稳定及起升缸的压杆稳定三方面入手，对叉车最大起升高度起重量进行理论计算，通过综合分析比较来最后确定，并作实例分析。
With analyse and compare the results of calculate stability on longitudinal, lateral and lift cylinder, confirm the forklift capacity at Max. lift height, and make example analysis.
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