grooved barrel槽: trough; manger纹: lines; veins; grain机: machine; engine膛: chest; thorax槽纹机膛管段: grooved barrel section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:槽纹机膛,即可在微信中查询翻译