试验证明，采用三甲酸铝为鞣剂，成品革在面积得革率、单位面积重量、紧实性以及耐老化性等方面都具有优越的性能。

And tests showed that there are considerable advantages for aluminium triformate in area yield, area weight, firmness properties and ageing stability.

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给出了无限秩仿射李代数的实形和某种类型的紧效实形的定义，并证明了这种紧致实形在自同构下的唯一性。

In this paper, we define real form of infinite rank affine Lie Algebra and we also give its some types of compact real form which is proved unique under automorphism.

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本文着重研究了实型铸造工艺中振动紧实台振动参数与砂体流动性、充填性及紧实度的特性关系。

The relationship between vibration parameters of compaction table and sand fluidity, filling and compaction for EPC was researched in this paper.

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