trunnionn.
英 'trʌnjən | 美 'trʌnjən
中文n. [机] 耳轴；炮耳
词根词源
trunnion (n.)"either of two round projections of a cannon," 1620s, from French trognon "core of fruit, stump, tree trunk," from Middle French troignon (14c.), probably from Latin truncus (see trunk).
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