noun 下载 🔗分享 环状凹槽，环形槽。 A ringlike groove, such as that around the cylinder of an elongated bullet for small arms to contain a lubricant, or around the rotating band of a gun projectile to lessen the resistance offered to the rifling. Examples : "The rifle bullet displayed distinct cannelures designed to hold the lubricant and improve its passage through the barrel. " 这颗步枪子弹上有清晰的环状凹槽 (huan zhuang ao cao)，用于储存润滑剂，从而改善它在枪膛内的通过。 military weapon technical 与AI对话词汇游戏阅读练习
