BRIEF-Minmetals Development's Unit Signs Procurement Contract Worth 1.75 Bln Yuan With Rio Tinto Commercial

March 6 (Reuters) - Minmetals Development Co Ltd :

* SAYS UNIT SIGNS LONG-TERM PROCUREMENT CONTRACT WORTH ABOUT 1.75 BILLION YUAN WITH RIO TINTO COMMERCIAL PTE LTD Source text in Chinese: https://bit.ly/2TG9tON Further company coverage: (Reporting by Hong Kong newsroom)