就本质而言，热塑性塑料的机械性能低于金属，但可以通过加入玻璃纤维强化予以增强来适应某些运用。
The mechanical properties of thermoplastics, while substantially lower than those of metals, can be enhanced for some applications through the addition of glass fiber reinforcement.
合金钢本质上是碳钢加上其它的元素来改变它的特性，而给合金金属带来一种预期的机械性能。
Alloy steels are basically carbon steels with additional elements added to alter the characteristics and bring about a predictable change in the mechanical properties of the alloyed metal.
焊缝金属的机械性能焊缝金属的机械性能不是分类中的一部分。
Mechanical properties of the weld metal Mechanical properties of the weld metal are not part of the classification.
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