Floor drain and suction valve safety issues

Indoor riser drainage with the same floor is a novel design and construction of the installation process is completed in the reinforced concrete floor, the body will be flat thin horizontal drain and pipe network, the leveling layer directly into the riser. After the toilet drainage, or split t

China's chemical market presents shock adjustment

In December 2006, affected by the slowdown in global economic growth and the overall oil price level in November, the price of domestic petrochemical products continued to fall slightly from high levels.
With international crude oil prices stabilized and stabilized at around US$60/bbl, so