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Patent
《A new rainwater well》
2021-08-20
《Construction and installation method of a large ventilation
2021-05-15
《A pipe valve group prefabrication mould for construction si
2021-04-16
《A platform for assembling and hoisting air ducts on the con
2021-03-16
《A building electrical construction installation equipment》
2020-06-30
《A bending equipment for production of pipe fittings》
2020-06-26
《An installation device for electromechanical equipment》
2020-06-26
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