gib head key弯头: angle head; elbow; elbow pip ...键: key弯头: angle head; [机械工程] elbow; elbow pipe; ell; knee bend; bend 回转弯头 return bend; 接合弯头 joint elbow扁头键: gib headed key沉头键: sunk key下载手机词典可随时随地查词查翻译