Are weight restriction defined for boxes?

是否有规定盒子的重量？

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Topology optimization is used during the design process to solve the problems of weight restriction and material distribution in construct design of air-bomb computer.

为了解决机载计算机零件结构设计过程中出现的材料分布不合理及重量要求苛刻等问题，在设计过程中引入拓扑优化。

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Complainants say the gap between the bollards, which enforce a width and weight restriction, is too narrow.

BBC: Worle 'narrow gap' bollards to remain

Because scaffolding is needed to complete the work, the weight restriction has been reduced from 16.5 tonnes to 7.5 tonnes.

BBC: Bigsweir Bridge

The council said a weight restriction had been placed on the bridge which carries the A6 over the Derby to Birmingham railway.

BBC: A6: Derby's London Road Bridge to close for up to a year