46.下列何者是銲接冷裂(Cold Cracking)裂紋？
(A)氫延遲裂紋(Hydrogen Delayed Cracking)
(B)延展性不足裂紋(Ductility - Dip Cracking)
(C)液化裂紋(Liquidation Cracking )
(D)固化裂紋(Solidification Cracking)

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