单项选择题
A.Cargo whip
B.Gooseneck fitting
C.Spider band
D.Topping lift
单项选择题 Which operation may cause the pressure in an inert tank to fall below the prescribed limits（）.
单项选择题 Which of the following statements is FALSE concerning cranes being installed on the centerline of vessels（）.
单项选择题 Which of the following statement（s）is/are TRUE regarding a twin pedestal crane set（）.