摘要
On May 7th an accident of phosphorus trichlo-ride leakage happened in Hebei Xinfeng Pesti-cide & Chemical Stock Co.,Ltd.located in Tiexi Chemical Industry Zone northwest of Handan,Hebei province.Great quantities of the toxicgas were spread to residential areas close by.Forty four persons were poisoned andhospitalized.The accident was caused by valvedamage in the gas storage tank and