And freezing and thawing characteristics of high volume fly ash (HVFA) concrete are Bê tông có hàm lượng tro bay cao: High Volume Fly Ash Concrete (HVFA)
ash It wasn't mountain ash, but it seemed to work. Nó không phải là tro núi...
concrete There's going to be reinforced concrete under the vault. Các bạn sẽ thấy bê...