Utilize the input text as a context reference, choose the right relationship between 'Stratasys' and '3D printing' from the options.
Options: developer, chief executive officer, industry, operator

Stratasys Ltd. SSYS is showcasing its 3D printing solutions at the International Trade Fair for the Plastics and Rubber Industries (T-PLAS) in Bangkok, Thailand which started yesterday and will run through Aug 29.
industry