Technical contract should require the contract to provide the valve body and its day-to-day maintenance manual annex, annex agents and sellers of contact address, fax, phone number.

• 技术合同中应要求合同方提供阀门本体及其附件的日常维护手册，胶木手轮、附件代理商及销售商的联系地址、传真、电话号码。