The SRA has better effect than lignosulphonate calcium as the forming retarded time is longer.

在延迟成型时间较长时，SRA起到的缓凝作用比木钙更明显。

youdao

The SRA has better effect than lignosulphonate calcium as the forming retarded time is longer.

在延迟成型时间较长时，SRA起到的缓凝作用比木钙更明显。

youdao