《A Practical and Theorical Treatise on the Detached Lever Escapement for Watches and Timepieces》(1866) By Teddy Zhang in 📖 Literature｜圖書文獻 — 04 Nov 2025 Subscribers Only｜註冊限定 Subscribe Now｜現在訂閲 Already have an account? Sign in｜已經註冊？登入
