Source register and evidence policy
Every factual layer has a defined job. Product ratings come from the supplied catalogue, not from competitors or generic web pages.
| Evidence class | Source | Material | Permitted use |
|---|---|---|---|
| Primary | Supplied archive | 17 catalogue, comparison and image files | Model tables, drawings, product and application images |
| Supporting | Google Drive | 2025 product selection guide and matching HZPT/CMN files | Current company identity, taxonomy and revision awareness |
| Market | World Bank WITS / UN Comtrade | 2023 HS 841480 reporter table | Broad import context; not model demand |
| Standards | ISO | ISO 8573-1:2010 and ISO 11011:2013 official pages | Purity-class and assessment terminology |
| Guidance | U.S. Department of Energy | Compressed Air Sourcebook | System assessment context |
Attachment mismatch handled: the request mentions a bevel-gear catalogue, but the uploaded archive contains air-compressor materials and the requested target markets are for air compressors. This release therefore publishes the compressor evidence actually supplied.