seaming head卷边: edge curl; bowing; roll hem; ...封: close; seal头: 5点就得动身 have to start before ...弯边封头: flanged head折边封头: flanged head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:卷边封头，即可在微信中查询翻译
