◎ Guangdong: Shaoguan natural sand, machine-made sand and gravel increased by 2 yuan / ton compared with the 9th; Qingyuan natural sand reported an increase of 3 yuan / ton
Double Ended Ferrule “Taishan quality” certification is the use of certification means in Shandong Province to cultivate a number of quality brands that meet the requirements of “quality, independent innovation,
Advanced technology! The strength of C130 ultra-high strength concrete has reached 149.5mpa, 1.5 times that of C80, and the strength is higher than that of granite. The pumping height has