急求翻译：它是原中国机械部、化工部等单位的阀门定点供应单位

纠正一下：
原机械部，不能翻译成original——，“ex-”前缀来表达是正确的，如前妻：ex-wife

Our company is the Designated valve supplier of ex-Ministry of Machinery and ex-Ministry of Chemical Industry

希望对你有帮助
欢迎更地道的表达切磋！

It is the original China Machine, the Department of Chemical and other units of the fixed supply valve unit. . .