The country's infrastructure sector grew 3.2 per cent in July this year. The eight infrastructure sectors had grown at 5.2 per cent in June this year, and 1.3 per cent in July last year.According to official data, petroleum refinery production expanded 13.7 per cent in July this year, coal output rose 5.1 per cent, natural gas production increased 3.3 per cent, and cement production grew 1.4 percent during the month.But the steel sector contracted 0.5 per cent in July, and crude oil production fell 1.8 percent.