muzzle clamp炮口: gun muzzle; mouth箍: hoop; ferrule; band扩口箍: beaded ferrule炮口盖: gun muzzle cover炮口门: muzzle door下载手机词典可随时随地查词查翻译关注微信公众号：chachacidian，回复:炮口箍，即可在微信中查询翻译
