公司用单位抬头纸出具的邀请函，确认您将访问谁、由谁陪同或在您访问期间 由谁资助。
A letter of invitation from the business on their official headed paper confirming who you will be visiting, staying with or supported by during your visit.
为了提供您满意的服务，公司同时在各地区设立本公司经销商并自组售后服务单位，提供安装及优质售后服务。
At the same time, in order to provide you with satisfactory services, we have established distributors and organized after-sales centers and also offered installation services in many areas.
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