What is difference between general industry and construction work?

General industry work is employment within an industrial facility making or processing items or chemicals for use by others. It often involves work at the same location every day, but can involve working at different locations, as for example, sales people calling on possible customers or those who visit a customer's location to repair or install equipment such as photocopiers. These individuals often work under the supervision of a superior, but sometimes are self-directed.

Construction work involves making, remodeling or repairing structures such as buildings, bridges, and roads and usually involves the expectation that the worker will not work permanently at one location. This work is usually performed in the field away from the employer's main office and often without direct supervision.