Z-10 attack helicopters and Z-20 utility helicopters attached to the Chinese PLA Army's Thunder Aerobatic Team fly in arrow formation during the 7th China Helicopter Exposition . (eng.chinamil.com.cn/Photo by Luan Cheng) 第七屆中國國際直升機博覽會于10月16日至19日在天津舉辦。圖為陸軍風雷飛行表演隊直-10和直-20直升機箭頭編隊飛行。(英文中國軍網(wǎng)/欒鋮 攝)
