问题
单项选择题
The device that allows a floating ship to sway without bending the marine riser system is the（）.
A.yaw joint
B.sway joint
C.slip joint
D.flex or ball joint
答案
参考答案：D
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The device that allows a floating ship to sway without bending the marine riser system is the（）.
A.yaw joint
B.sway joint
C.slip joint
D.flex or ball joint
参考答案：D
