Which of the following is NOT a classification for industrial trucks?

Industrial trucks are classified based on their design and the type of energy they use for operation. Electric trucks, hydraulic trucks, and manual trucks are standard classifications widely recognized in the industry. Electric trucks are powered by electric motors, making them suitable for indoor use with a lower environmental impact. Hydraulic trucks utilize hydraulic systems for lifting and moving loads efficiently. Manual trucks, often referred to as hand pallet trucks or hand trolleys, rely on manual effort for operation, typically for moving lighter loads.

Pneumatic trucks, while they may exist in certain contexts, are not commonly recognized as a distinct classification for industrial trucks. Pneumatics generally refer to systems that use compressed air for power and are more associated with tools and machinery than with classified industrial trucks for material handling. As such, pneumatic trucks do not fit within the conventional framework used to categorize industrial trucks.