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Common Problems  ①The trouble diagnose and treatment for the Circulation System of Organic Thermai Fluld Hearer.
 ②The trouble diagnoses and treatment for the Combustion System of Heater with burning coat.
 ③The trouble diagnoses and treatment for the Cmbustion System of Heater with burning oil.
 ④The trouble diagnoses and treatment for the Cmbustion System of Heater with burning gas.
 ⑤The trouble diagnoses and treatment for the Electric Heater.

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