noun ダウンロード 🔗共有 溝、溝状のくぼみ 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 ammunition expert pointed out the cannelure on the bullet, explaining that it helps hold lubricant, improving the gun's performance. " 弾薬専門家は、銃の性能を向上させるために潤滑剤を保持するのに役立つと説明しながら、弾丸の溝状のくぼみを指摘した。 technical military weapon machine part AIとチャット語彙ゲーム読解練習