As for an oil-fired boiler if at a normal steaming...
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As for an oil-fired boiler if at a normal steaming condition and water goes out of sight in gauge glasses the action you should take is: () (1) secure oil to fires (2) increase feed pump pressure

发布日期:2021-03-22

A.(1)

B.(1)and(2)

C.(2)

D.neither(1)nor(2)

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