Dear Sir/madam We are importing the machine to Vietnam, we are in need of information for comfirm with our Goverment about one of your SDH series, the hot chamber (vertical type), model: SDH-7.5A (7.5 tons) In details, we want to ask for the specific manufactured date of these three machines: - Name of the machine: Hot chamber (vertical type) - Model name: SDH-7.5A - 3 Serial numbers: 15004 & 15003 & 13002 Please, kindly support us to check for the year of manufacture about those machines. Thanks in advance. Best regards!