main pin brass主: host销: melt cancel; annul铜: copper衬: line; place sth. underneath主销铜衬扁销止动螺钉: main pin brass cotter set screw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:主销铜衬，即可在微信中查询翻译
