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Metal product research and development; Metal tool manufacturing; Hardware product manufacturing; Metal structure manufacturing; Metal product repair; Plastic product manufacturing; Plastic product sales; Steel rolling processing; Furniture manufacturing; Furniture parts and accessories sales; Furniture parts and accessories production; Hardware product retail; Hardware product wholesale; Door and window manufacturing and processing; Metal door and window engineering construction; Indoor wooden door and window installation services; Construction metal fittings manufacturing; Construction metal fittings sales; Fiberglass reinforced plastic product manufacturing; Metal structure sales; Mechanical and electrical equipment manufacturing; Mechanical and electrical equipment sales; Internet sales (excluding products that require licensing); Metal chains and other metal products manufacturing; Metal chains and other metal products sales; Metal product sales (except for projects that require approval according to law, independently carry out business activities in accordance with the law with a business license).