knock-pin

英['nɒkp'ɪn] 美['nɒkp'ɪn]
  • n.顶出杆
  • knock v.敲击;互撞;攻击n.敲;敲门;敲打
  • under prep.低于;在...下;在...内;在...控制下adv.在昏迷中;在...下adj.下面的;从属的;少于的