Military dog tags with silencers. Silencers are rubber rings that cover the outer edge of the tags to keep them from clanging together.<br/>狗牌<br/>air force、army、bookami clip art、dog tag、marines、military、navy、necklace、seal、special forces、tags、volunteer<br/>空軍、軍隊、剪貼畫書、狗牌、海軍陸戰隊、軍事、海軍、項鍊、密封、特種部隊、標籤、志願者<br/>資料來源：openclipart ( https://openclipart.org/ )