PKG independently observed candidate: Буровая твердосплавная коронка типа СМ-9 D=73 Canonical: https://productknowledgegraph.com/workspace/pw_Arth1TwNeqRw34LG--WaKcKkutU7gntd/products/pr_P_5g9IpeubBcLj-udV8jJOg-pLQP5XNc 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_P_5g9IpeubBcLj-udV8jJOg-pLQP5XNc/evidence.jsonl