barrel extension枪管: gun-barrel; barrel; barrel a ...延伸: extend; stretch; elongate; r ...部: part; section; division; reg ...喷管延伸段: nozzle extension极延伸部分: pole extension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:枪管延伸部,即可在微信中查询翻译