Utilize the input text as a context reference, choose the right relationship between 'Stratasys' and '3D printing' from the options.
Options: industry, parent organization, developer, distributed by

Following the longstanding success of using Stratasys PolyJet and FDM 3D printing for prototyping applications, the company now deploys its Fortus 3D Production Systems to expand its direct manufacturing services to customers.
industry