A heavy steel device that is set on the sea floor and used as a drilling template in offshore drilling operations is called a（）.<br>A:temporary guide base<br>B:permanent guide base<br>C:guide frame<br>D:foundation template

A heavy steel device that is set on the sea floor and used as a drilling template in offshore drilling operations is called a（）.
A:temporary guide base
B:permanent guide base
C:guide frame
D:foundation template

出自：海船船员证

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