Civilization manualBook 1: From Bare Hands to Steam and Electricity765 entries · 23 phases · 100 years
The Island
Phase 12 — Precision and machine tools  /  About year 34
12.28

Pressure gauge

a curved brass tube that straightens under pressure and moves a pointer

MakingYear 34Stands on 173 earlier

AWhat it needs

Needs 173 other products in all, 3 of them directly.

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