... and is valid for the following period: 2012/10/21 --- 2013/10/21 All the information below may covers both Gold ... Units Produced(Previous Year) Track Shoe, Track Chain, Track Group, Steel Structure Track Shoe 6,000 Tons / Month, Track Chain, Track Group 1,900 Pcs / Month ... , Steel Structure 1,800 Tons / Month Track Shoe 18,000 Tons, Track Chain, Track Group 15,000 Pcs, Steel Structure 12,700 ...