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單項選擇題

The words PIPE，BUTT，TUN AND PUNCHEON all refer to（）.

A.the sizes of casks
B.various lengths of timber
C.structural shapes used in construction
D.viscosities of liquid cargoes

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單項選擇題

The welds used to join shell plates in flush construction are known as（）.

A.butt welds
B.seam welds
C.fillet welds
D.continuous welds

單項選擇題

The welds used to attach stiffeners to a plate are known as（）.

A.butt welds
B.seam welds
C.fillet welds
D.plate welds

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