When does auxiliary burner of rotary nozzle incinerator begin to work? () Ⅰ.hen igniting Ⅱ.he sludge for dealing with is too much Ⅲ.efore stopping incinerator
When does auxiliary burner of rotary nozzle incinerator begin to work? () Ⅰ.hen igniting Ⅱ.he sludge for dealing with is too much Ⅲ.efore stopping incinerator
Under rotary pumps are the gear, (), cam-and-piston and screw types.
Increasing the speed of a rotary pump above its rated speed will result in which of the following conditions to occur?()
Which of the following statements represents the advantage of rotary pumps as compared to reciprocating pumps?()
A special device that,when fitted into the rotary table,transmits torque to the kelly and simultaneously permits vertical movement of the kelly to make the hole is called a().
Operating a rotary pump at speeds in excess of design requirements could cause().
A rotary current sets through all directions of the compass. The time it takes to complete one of these cycles is approximately().
The velocity of a rotary tidal current will be decreased when the Moon is().
With reference to a rotary vane steering gear system, which one of the following statements is true?()