When the negative pressure of the furnace is too large, should ( ).

The amount of atomizing steam in the heating furnace is normal, and the flame of the nozzle is too long, then it should ( ).

The amount of atomizing steam in the heating furnace is normal, and the color of the nozzle flame is white, then it should ( ).

The following selections that fall under the "four knobs" of unit management are Knobs ( ).

The following selections that fall under the "three boards" of Unit management are Will ( ).

The following selections belong to the "three meetings" of unit management are meetings ( ).

The following options that fall under the "four Know" of unit management are Know ( ).

N type crankshaft plunger type metering pump pump head is mainly composed of drainage valve, liquid cylinder, suction valve, ( ) and plunger and other parts.

Diaphragm metering pump between the pump cylinder and diaphragm pump is ( ) sealed, so it can be absolutely leak-proof.

The plunger type metering pump is mainly composed of the pump cylinder, ( ) and the plunger stroke adjustment mechanism.

N type crankshaft plunger type metering pump is mainly composed of ( ) and transmission adjustment mechanism.

For metering pumps, flow is generally regulated by ( ).

Reduce the stroke of the piston or plug to measure the flow of the pump ( ).

The following statement regarding the cause of non-discharge or insufficient discharge of the metering pump is incorrect ( ).

Increase the stroke of the piston or embolme to measure the flow of the pump ( ).