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three-ply adj. 三重的,三股頭的(線等)。2.n. 三夾板,三...

three-point landing

They found out that even a very thin sheet of this three-ply metal was not damaged by corrosion after five years . 他們發現即使是極薄的“三層合金”板泡上五年也不會腐損。

This makes a three-ply metal . 這樣就制成了一種三層金屬材料。