The main function of the drawworks on a ship is to（）.
1、The function of the piston compression
The function of the piston compression rings used in a diesel engine is to （）Aseal the space between the piston and linerBtransmit heat from the piston to the cylinder linerCreduce the amount of combustion gas blow-byDall of the above
2、The main function of tie rods in the c
The main function of tie rods in the construction of large, low speed diesel engines is to（）.Astiffen the bedplate in way of the main beari...
3、The main function of the lubrication s
The main function of the lubrication system in to enable （） of a film of oil between the moving parts.Athe informationBthe formationCthe scatterDthe frictio
4、What is the main concern of man on the
What is the main concern of man on the fourth level?A The more goods the better.B The more "luxury" items the better.C The more mental satisfaction the better.D The more earnings the better.
5、The function of the hydraulic telemoto
The function of the hydraulic telemotor transmitter used in an electro-hydraulic steering gear system is to （）.Atransmit the rudder angle to t...
6、The basic function of the centrifugal
The basic function of the centrifugal pump impeller is to （）.Adirectly increase the pressure of the liquid being pumpedBdirectly increase the ...