Forming apparatus of the fuel-saving multi-wall hardness stiffened girder multiple wall sewage pipe

The present invention relates to a molding device of fuel-saving and stiffness-reinforcing multiple wall sewage pipes. According to the present invention, grooves are formed at any one side center of the left side and right side of a profile comprising a plurality of hollow parts and cross reinforci...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	JANG, SOO HO
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING BLASTING CESSPOOLS ENGINEERING ELEMENTS AND UNITS FIXED CONSTRUCTIONS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULARARTICLES JOINTS OR FITTINGS FOR PIPES LIGHTING MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING PERFORMING OPERATIONS PIPES SEWERAGE SEWERS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL TRANSPORTING WATER SUPPLY WEAPONS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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