Which action(s) is/are included in crane operations?（）<br>A:Normal boom stowage and shutdown operations<br>B:Emergency shutdown operation<br>C:Removing booms from stowage<br>D:All of the above

Which action(s) is/are included in crane operations?（）
A:Normal boom stowage and shutdown operations
B:Emergency shutdown operation
C:Removing booms from stowage
D:All of the above

出自：海船船员证

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