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Patents and Certificates
2026-10-26
Utility Model Patent Certificate 2
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Home
Products
Flood Gates
Cone Valves
Dual-speed Gate Valves
Custom Sluice Gates
Electric Valves
Pneumatic Valves
Sludge Discharge Valves
Intelligent Manhole Covers
Automatic Car Park Flood Barriers
Custom Equipment
About Haojiu
Company Profile
Patents and Certificates
Technical Resources
Product Catalogue
Product Resources
Technical Articles
Custom Engineering
Product Gallery
Automatic Flood Gates
Valves and Testing
Applications
Contact Us
