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{

  "cmd": "voice","msg": "微信收款31.22元",
  "print":[
      {"info":"测试打印字体大小为32，微信收款31.22元","size":32,"align":"left","bold":0,"offset":0，"step":200},
      {"qrcode":"https://www.baidu.com","size":16,"step":200}
  ]

}