材料购买合同书样本卖方：______________(以下简称甲方)地址：______________邮编：______________;电话：______________;传真：______________;电子邮箱：_______________;买方：______________(以下简称乙方)地址：______________邮编：______________;电话：______________;传真：______________;电子邮箱：_______________;甲乙