NF P15-302-外文
水硬性胶凝材料 - 热带用水泥 - 组成、规格和合格标准
Hydraulic binders — Cements for tropical use — Composition, specifications and conformity criteria
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Hydraulic binders — Cements for tropical use — Composition, specifications and conformity criteria
Hydraulic cements - Cements for tropical climates: Composition - Specifications - Conformity criteria