(Adds details) By Martyn Herman RIO DE JANEIRO, Aug 12 (Reuters) - Gong Jinjie and Zhong Tianshi claimed China's first ever Olympic track cycling gold medal when they won the women's team sprint title on Friday, beating Russia in the final. The Chinese broke the world record in qualifying for the final and were too strong for Russians Anastasia Voinova and Daria Shmeleva as they sped to gold. Germany's Mirian Welte and Kristina Voegel beat Australian duo Anna Meares and Stephanie Morton for bronze, denying Meares a sixth Olympic medal. More...