Refer to the input text as context and select the correct relationship between 'Stratasys' and '3D Printing' from the available options.
Options: product/material produced, creator, platform, distribution format

Stratasys Ltd. 23/07/2015 | Press release Stratasys’ Solidscape and Kangshuo Group Launch Market Expansion in China With Largest 3D Printing Service Bureau Network
product/material produced