粉煤灰高性能混凝土就是其中一种性能优异的高性能混凝土。

PFA high performance concrete is one of the best performance high performance concrete.

youdao

粉煤灰高性能混凝土就是其中一种性能优异的高性能混凝土。

PFA high performance concrete is one of the best performance high performance concrete.

youdao