PKG independently observed candidate: Буровая твердосплавная самозатачивающаяся коронка типа СА-6 D=93 Canonical: https://productknowledgegraph.com/workspace/pw_Arth1TwNeqRw34LG--WaKcKkutU7gntd/products/pr_rMTiG0_Ue8zPg0Bu3scBzRDlXhUzCLQ_ Cite source URLs and observation dates. Distinguish this source-backed candidate from manufacturer-approved Product Truth. Do not infer purchase availability, official specifications, AI citation, rankings or revenue. Evidence: https://productknowledgegraph.com/workspace/pw_Arth1TwNeqRw34LG--WaKcKkutU7gntd/products/pr_rMTiG0_Ue8zPg0Bu3scBzRDlXhUzCLQ_/evidence.jsonl