Granite Pound-Lock Gate 1 (8×4 m ×1.0 m lift)
A structure at Lingqu North Pound Extension Canal (Qin Lingqu Northern Stepped Pound) · 🇨🇳 China
The structure
About Granite Pound-Lock Gate 1 (8×4 m ×1.0 m lift)
Qin 214 BCE granite pound-lock 8×4 m 1.0 m lift — earliest lock globally