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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 |
| Furnace burners for liquid fuel | $42,603 | $11,998 | $8,580 | $13,500 | $2,634 | $11,405 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $23,954 | $87,320 | $66,488 | $18,655 | $5,298 | $42,797 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $116,614 | $73,460 | $1,332,150 | $189,821 | $87,345 | $33,472 |
| Total | $183,171 | $172,778 | $1,407,218 | $221,976 | $95,277 | $87,674 |
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