凯旋
2007-10-29, 09:47
中华人民共和国国家标准
轻集料及其试验方法
第1 部分:轻集料GB/T 17431.1-1998
Lightweight aggregates and its test methods
Part1:Lightweight aggregate
轻集料及其试验方法
第1 部分:轻集料GB/T 17431.1-1998
Lightweight aggregates and its test methods
Part1:Lightweight aggregate