DIN 18257 Security Escutcheon & Core-Shield Through-Bolt Jig (.DXF)

Deterministic PZ-keyway datum registration + bolt-boss interference check against DIN 18251 lock-case through-holes engine (.dxf, .pdf, .stl) built for Rostex, Disec, ABUS, Hoppe — zero-upload ephemeral Wasm RAM execution.

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