U.S. firms themselves may not have a high labor component in their cost structure but their suppliers — and their suppliers — do.

在成本结构当中，美国公司本身的劳动力成本所占比例也许不高，但他们的供应商——以及供应商的供应商——就不是这样了。

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U. S. firms themselves may not have a high labor component in their cost structure but their suppliers - and their suppliers - do.

在成本结构当中，美国公司本身的劳动力成本所占比例也许不高，但他们的供应商——以及供应商的供应商——就不是这样了。

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Resolve the problem of stress focus don't adopt increasing component dimension, but structure measure by reducing stress focus or locally supplying strength.

解决应力集中问题不应通过加大构件断面尺寸，而应采用降低应力集中的结构措施或局部补强。

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