A Russian helicopter maker has delivered four more Mi-171E multipurpose helicopters to China under a 2012 contract.
The Russian Helicopters, or Rosvertol, holding signed the contract last year for the delivery of 52 Mi-171E helicopters to China's Poly Technologies.
"Counting this delivery, the customer has received a total of 32 helicopters. The remaining units are expected to be delivered in 2014," Rosvertol said Monday in a statement.
The Mi-171E helicopters, manufactured at the Ulan-Ude aircraft factory in Russia's East Siberian republic of Buryatia, is an advanced export version of the famed Mi-8 transport helicopter, capable of transporting 37 passengers or four metric tons of cargo for a distance of 610 kilometers (380 miles) at a speed of 250 kilometers per hour.