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The pentagon earlier this year issued an exception to buy fasteners containing foreign-made speciality metals .

今年早些时候，五角大楼颁布了一项例外措施，允许购买含有外国制造的特殊金属的扣件。

Specialized metal fasteners couldn 't be produced quickly enough .

专用金属紧固件不能足够快地生产出来。

Stress area and bearing area for threaded fasteners .

螺纹紧固件应力截面积和支承面积。

Key lessons : a lack of attention to commodity items such as fasteners can put a company at risk .

重要教训：如果对紧固件等大宗零部件未给予足够的关注，可能会让一家公司陷入险境。

In what was seen as retaliation , china slapped duties on imported carbon-steel fasteners from europe .

被视为报复之举的是，中国对从欧洲进口的碳钢紧固件开征关税。