Sub Headings of 2849

2849.10.00.00 Of calcium
2849.20.10.00 Crude
2849.20.20.00 In grains, or ground, pulverized or refined
2849.90.10.00 Of boron
2849.90.20.00 Of chromium
2849.90.30.00 Of tungsten
2849.90.50.00 Other