船舶主推进装置1..3船舶推进装置1..3.1推进装置的传动方式Large, slow speed, two-stroke marine diesel engines are directly coupled to the propeller and do not require a（ ）.

Large, slow speed, two-stroke marine diesel engines are directly coupled to the propeller and do not

A、

gearbox

crankshaft

thrust block

piston

Large, slow speed, two-stroke marine diesel engines are directly coupled to the propeller and do not

A、 gearbox
B、 crankshaft
C、 thrust block
D、 piston

Large, slow seed, two-stroke marine diesel engines are directly coupled to the propeller and do not require

A、gearbox
B、crankshaft
C、thrust block
D、piston

船舶主推进装置1..3船舶推进装置1..3.1推进装置的传动方式In reducing engine speed to an efficient propeller speed by the use of

A、speed and torque are both reduced
B、speed is reduced and torque remains unchanged
C、speed is reduced and torque is increased
D、speed is sometimes unchanged while torque is increased