单项选择题
A.125 mm
B.183 mm
C.215 mm
D.It depends on outside pipe diameter
单项选择题 A firemans outfit carried onboard cargo vessels, must have a （）.
单项选择题 Which of the following statements represents the correct action to take when three crew members discover a fire?（）
单项选择题 A new ocean going ship of 2000 gross tons having an inoperative oily water separator may dispose of its bilge slops by （）.