Water glass can not be used for brushing or impregnation of ( ) to improve its weathering resistance.
A、claybricks;
B、Portlandproducts;
C、cementconcrete;
D、gypsumproducts
发布时间:2026-02-18 19:32:28
A、claybricks;
B、Portlandproducts;
C、cementconcrete;
D、gypsumproducts