The Ultimate Guide To Concrete
确定的,确实的;具体的,有形的,实在的 They think she killed her partner, but they've no concrete evidence. 他们认为她杀死了自己的丈夫,但是没有确凿的证据。Substantial-toughness concrete mixed possesses compressive power which is around 6 thousand lbs for each region unit. This can be processed by decreasi