(one) fan maintains working system1. Fan must person specially assigned for a task is used, maintenance of person specially assigned for a task. 2. Fan must not in spite of illness moves. 3. The dirt of interior of fixed and cleared fan, especially the impurity such as the dirt on impeller, bilge, in order to prevent rustily with unbalance. 4. Fan maintenance must emphasize cutting off the power above all jockey. 5. Check regularly to the sensitivity of thermometer and oily mark. 6. Except tear open every time outside lube should changing after repairing, month of the 3-6 below normal circumstance replacings lube. (2) the primary failure of fan and reason1. Bearing case is severe shake① fan axis and electric crankshaft are different heart, shaft coupling outfit is crooked② housing or air i……(此为英语引子)
　　

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