spruen.
英 spruː | 美 sprʊ
中文n. 注入口，铸口；[内科] 口炎性腹泻（热带病的一种）；熔渣
词根词源
sprue (n.)"piece of metal (later plastic) attached to a cast object," 1875, earlier (1849) "channel through which metal is poured into a mold;" of unknown origin.
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