The velocity of the current in large coastal harbors is().
A、predicted in Tidal Current Tables
B、unpredictable
C、generally constant
D、generally too weak to be of concern
A、predicted in Tidal Current Tables
B、unpredictable
C、generally constant
D、generally too weak to be of concern
A、a difference in water pressure B、the method of breaking up the water stream C、the length of the applicator D、All of the above
A、directly increase the pressure of the liquid being pumped B、directly increase the velocity of the liquid being pumped C、convert the potential energy of the liquid to kinetic energy D、separate air from the liquid being pumped
A、greater range than high-velocity fog B、lesser range than high-velocity fog C、about the same range as high-velocity fog D、greater range than a solid stream
A、A.velocity of the current B、B.bottom characteristics C、C.depth of the water D、D.speed over the ground
A、A.velocity of the current B、B.bottom characteristics C、C.depth of the water D、D.speed over the ground
A、improve fuel economy B、increase the air charge velocity C、reduce the risk of explosion D、all of the above
A、decrease the velocity of gases flowing past the tubes B、increase the rate of heat transfer C、reduce accumulations carbon deposits D、direct the flow of gases