... flange cover to environment management systems of Zhangjiagang Huari Flange Co., Ltd. It is situated Jinfeng Town, Zhangjiagang City, Jiangsu Province ... /3170/0004/3 Heat treatment sub-contracted to Zhangjiagang Chenchuang Mechanical Technology Co., Ltd. of Yongli Village, Lieyu Town, Zhangjiagang City, Jiangsu ...