The crankshaft is used to change the ____________ motion of the piston into __________ motion. A: reciprocating, rotary B: rotary, reciprocating C: vertical, horizontal D: horizontal, vertical

The hydraulic condition of the rotary baffle plate flocculation tank is better than that of the reciprocating type， and head loss of the rotary type is 40% less than that of the reciprocating type。 （ ）

Data relating to the direction and velocity of rotary tidal currents can be found in the ______

The ports are drilled in the liners at an angle of approx 202103 the result being that （） is given a rotary movement.

It is held in the crankcase in the cylinder block and converts the reciprocating motion of the pistons into a rotary motion for the drive wheels．

The air leakage of tubular air preheater is larger than that of rotary air preheater (). A: Right B: Wrong

The linear motion of a diesel engine piston is converted to the rotary motion required to drive gears， propeller shafts， and generators by the （）.

Not having spoken English for years, her oral English is ______. A: rusty B: rotary C: miraculous D: feasible

Automotive engines are classified as the reciprocating engine and rotary engine according to the way they work; as the gasoline engine and diesel engine according to fuel they burn;

According to the fuel an engine burns, there are ________. A: reciprocating and rotary engines B: gasoline and diesel engines C: 4-cylinder and 6-cylinder engines D: inline and boxer engines