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What are the job names of home appliance distribution and installation?

Postnouns are as follows:

1. Dealer: responsible for distributing household appliances from warehouses or manufacturers to the address designated by customers.

2. Installation engineer: responsible for the installation of household appliances, including furniture and electrical appliances.

3. Technical support engineer: responsible for technical support of household appliances and solving problems encountered by customers during use.

4. After-sales service specialist: responsible for after-sales service of household appliances, including repair, maintenance, return and exchange, etc.