A 3D model of a foldable shopping cart, featuring black metal frame, yellow handlebars, and wire baskets, with a modern minimalist aesthetic. It has foldable design, smooth-rolling wheels, suitable for household storage, outdoor use, or daily shopping. （类目纠正：foldable shopping cart，原Other不准确，实际为便携折叠购物车）

A 3D model of a Fire Hydrant, featuring black metallic body, yellow rusted top, and attached metal chains with vintage industrial aesthetic. It has detailed textures and low polygon count, suitable for fire safety visualization or urban scene design.

A 3D model of an escalator, featuring metal frame, black steps with yellow safety strips, silver handrails and a modern, sleek aesthetic. It has detailed surfaces and smooth edges, suitable for commercial venues like shopping malls and metro stations.

A 3D model of a hot dog warmer machine, featuring a stainless steel frame, transparent glass, and multiple heating racks. It has an electric heating system, temperature control dial, and interior lighting, with a commercial, functional design and "DELICIOUS HOT DOGS" signage. Suitable for food service, concession stands, and fast food outlets.