报道说，工程师们花了18个月的时间重新设计外部燃料箱，同时参考了“哥伦比亚”号事故调查组提出的修改建议。
Engineers have spent 18 months redesigning the external tank and incorporating the changes recommended by the Columbia Accident Investigation Board.
并行工程环境下对设计所形成的产品进行可装配性评价，向设计者提供合理的修改建议，是DFA成功的关键。
The assemblability evaluation of product design and recommendations of design modification are key steps for the DFA of ce environment to be successful.
通过对扣件式钢管支模架体系设计与施工中几个问题的讨论，以及模板支撑架的计算与立杆长度取值，提出模板工程设计与施工应注意的问题和对规范相关条文的修改建议。
This article discusses several issues in the design and construction of fastener-type steel-tube die support system, the calculation of die support and the determination of vertical pole's length.
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