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單項(xiàng)選擇題

The hinge fitting used to attach the boom to the mast is the（）.

A.gooseneck
B.step
C.swivel
D.pintle

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單項(xiàng)選擇題

The heaviest type pallet is the（）.

A.factory pallet
B.shipping pallet
C.stevedoring pallet
D.warehouse pallet

單項(xiàng)選擇題

The head of the bend is the（）.

A.top or upstream beginning of a bend
B.bottom or downstream beginning of a bend
C.midpoint or center radius of a bend
D.center line or apex of a bend

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