A.do B.to do C.done D.doing
A.Reciprocating pumps B.Rotary pumps C.Centrifugal pumps D.Gear pumps
A.a watch which is kept with lower standard B.a watch which is kept when the ship isnt sailing C.a watch which is kept when the ship is sailing D.a watch which is kept when the ship is in a restricted visibility area
A.shaft and impeller B.motor and pump shaft C.casing and impeller wearing rings D.lantern ring and impeller
A.cylinder heads B.exhaust valves C.scavenging air D.injectors
