The methods for determining the lifting force and fulcrum positions of rear door in a delivery van are presented in this paper.
介绍了厢式载货汽车后门支撑举力值及支点位置的选择方法；
But acting as a grocery-delivery van was probably not what, more than 30 years ago, the original shuttle's designers had in mind.
但是表现得像一辆杂物运输车，并不是30多年前原航天飞机的设计者们所想要的。
He looked in the situation vacant pages of his local newspaper, where a local supermarket was advertising for van drivers for a new delivery service.
他正在本地报纸上找到了一份职位空白，有一产业天的超市为一个新的递收效劳雇用司机。
He looked in the situation vacant pages of his local newspaper, where a local supermarket was advertising for van drivers for a new delivery service.
他正在本地报纸上找到了一份职位空白，有一产业天的超市为一个新的递收效劳雇用司机。
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