three-ply
adjective, noun [ U ] uk/ˈθriː.plaɪ/ us/ˈθriː.plaɪ/
(PAPER/WOOD)
(木板、纸巾等)三层的,三重的
(wood, tissues, toilet paper, etc.) made of three layers joined together
(WOOL)
(毛线)三股的
(wool) consisting of three threads
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