FAANAW AN WANG 液晶显示 AN WANG 1.2mm 1,8mm 专业智能 2.0mn 20时 UNIQUE CRAFTSMANSHIP STRENGTH MANUFACTURING 静音不卡发 全家通用 The top is covered with a tight seal,and the vacuum heating layer can delay the heat dissipation of the liguid in the Interior,so as to achieve the purpose of insulation.