The standard categorizes manufacturer qualifications and component safety based on the complexity of the materials and the criticality of the parts. 1. Manufacturer Qualification Classes (Q-Classes)
Standardized materials with low processing requirements, such as unalloyed structural steels. Q2 (Special): din 2303 pdf
A collection of winning and honored images from this year’s nature-photo competition
A collection of amazing recent images made with the Hubble Space Telescope
Mourners of Pope Francis gathered at the Vatican, scenes from the the second weekend of Coachella 2025, a humanoid-robot half-marathon in China, and much more
Images of the people, animals, and landscapes of the Earth’s arctic and subarctic regions, photographed by Olivier Morin