Our Patents:
The patent for utility model ¹32236 Pipeline
system for liquid-gas transportation from September 10th, 2003
The patent for utility model ¹54405
System for utilization of oil gas and stratal water from June 27th, 2006
The patent for utility model ¹32138 Continuous footing from September 10th, 2003
The patent for utility model ¹32139 Continuous footing from September 10th, 2003
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