Engineering industry and Mechanical engineering

Mechanical engineering and engineering industry are semantically related in engineering science topic. In some cases you can use "Mechanical engineering" instead a noun "Engineering industry", when it comes to topics like machine building.

Mechanical engineering noun - The branch of engineering that deals with the design and construction and operation of machinery.

Engineering industry and mechanical engineering are semantically related in engineering science topic. You can use "Engineering industry" instead a noun phrase "Mechanical engineering", if it concerns topics such as machine building.