【单选题】When does auxiliary burner of rotary nozzle incinerator begin to work? I. When igniting; II. The sludge for dealing with is too much; III. before stopping incinerator.
【简答题】Dear Sirs, The Colston Engineering Co. Ltd. has asked for ta standing credit of $ 1000, but as our _____________ of the company is limited to a few months' trading _____________ an L/C basis, we shoul...
【单选题】When does auxiliary burner of rotary nozzle incinerator begin to work? Iwhen igniting II the sludge for dealing with is too much III before stopping incinerator