【正】 CNOOC Oil & Petrochemical Co Ltd held a ceremony on November 14th tobreak ground a fine chemical project at Dongfang Industry Park,Hainan provincewith th
【正】 Maleic anhydride is the third most important acid anhydride worldwide today,only surpassed by phthalic anhydride and acetic anhydride. Maleic anhydride i
Purpose: The Spitz classification of oesophageal atresia (OA)-based on the birth weight and the presence of a major cardiac anomaly was proposed 1994. Advances