concrete mixer
A company that produces concrete for a structure and usually delivers it to the construction site.
A concrete supplier is a company which produces and usually delivers concrete to the construction site of a structure.
Concrete production is the activity described here. Delivery is commonly part of that supply, while the subsequent placement of the concrete on the site is a separate construction activity.
A structural precast concrete fabricator makes concrete members before delivery. This supplier produces the concrete itself; the distinction concerns the supplied material and a finished concrete component.
