The head line is ()(松弛的).
A、tight
B、high
C、slack
D、low
A、tight
B、high
C、slack
D、low
A、let go all the lines forward including head line and spring B、let go the head line and spring only C、let go all the lines except a head line and a spring D、let go the head line and spring including all the lines
A、distance of the suction liquid level above the line of the pump B、distance the suction liquid level is below the center line of the pump C、force necessary to overcome frictional losses in the pump and piping D、amount in inches of mercury the total suction head is below atmospheric pressure
A、geographic pole and the magnetic pole B、lubber's line and true north C、horizontal and the magnetic line of force D、compass heading and the magnetic heading
A、the compass heading is in line with the lubber's line B、there is no lost motion in the gimbal rings C、no change of heading by compass is observed if you raise and lower the heeling magnet D、the gimbal rings do not strike the compass frame when they are tilted
A、The captain is the head of a ship. B、The master is the head of a ship. C、The deck department is under the command of the chief officer. D、The pilot is the head of a ship.