noun ダウンロード 🔗共有 溝 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. " ライフル弾は、潤滑剤を保持し、銃身を通過する際の抵抗を減らすように設計された、明確な溝を示した。 military weapon technical AIとチャット語彙ゲーム読解練習