信: letter; mail丰: abundant; plentiful; rich; f ...信丰行: shin fung hong信丰布轮工厂有限公司: hsin fing buff factory co., ltd信丰钢铁厂有限公司: shun fung ironworks ltd信丰利企业有限公司: shin feng li enterprise co., ltd信分拣: letter sorting信封: envelope 拆开信封 open an envelope; 防潮信封 a moisture-proof envelope; 撕开信封 tear open a letter; 用不封口的信封邮寄 post in an open envelope; 将信折好放进信封。 fold the letter and put it in an envelope. 请附上写明姓名地址的回信信封。 please enclose a self-addressed envelope