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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Furnace burners for liquid fuel | $428,000 | | $289,000 | $147,000 | | $147,000 | $102,000 |
| Furnace burners other than those for liquid fuel, incl. combination burners ... | $2,240,000 | $2,169,000 | $2,168,000 | $2,580,000 | $1,061,000 | $1,295,000 | $1,709,000 |
| Mechanical stokers (incl. their mech. grates), mech. ash dischargers & sim. ... | $687,000 | | $1,666,000 | $5,485,000 | | $2,135,000 | $7,306,000 |
| Parts of the furnace burners, mech. stokers & mech. ash dischargers & sim. ... | $2,982,000 | $3,527,000 | $2,820,000 | $4,128,000 | $2,532,000 | $1,337,000 | $1,661,000 |
| Total | $6,337,000 | $5,696,000 | $6,943,000 | $12,340,000 | $3,593,000 | $4,914,000 | $10,778,000 |
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