The si97bpatch.exe file you have requested: Mods / Science and Industry / Patches / Science & Industry V0.97a - 0.97b Patch - 40.8mb is not available. Perhaps try browsing all files for the game Half-Life and upload any files you want to share or are missing. This is the only information we could locate:

This file will update you from Science and Industry 0.97a to version 0.97b.

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