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thrum [θrʌm] v
gen.	把绳屑嵌人帆布等以防擦、堵漏; 乱弹; 弹弄; 用手指轻敲 (on)
archit.	把绳屑嵌人 (防擦， 堵漏)
thrumming adj.
tech.	帆布浸油植绒
textile	嵌入帆布的短碎毛或绳屑