粉煤灰渣—碱混凝土的特点是以一价金属化合物为激发剂。

The fly ash slag-alkali concrete is characterized by taking one valence metallic compound as activator.

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硬度是由一些两价金属阳离子引起的。

Hardness is caused by divalent metallic cations.

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平直度是评价金属板带质量的重要指标之一。

Flatness is one of the principal factors evaluating the metal plate and strip.

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