Dust-free room ventilation device

The utility model discloses a dust-free room ventilation device which comprises a first pipe body, a protrusion is arranged at one end of the first pipe body in a surrounding mode, the side, away froman edge opening of the first pipe body, of the protrusion is an inclined face, a sliding barrel is a...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	TU WEICHENG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BLASTING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING JOINTS OR FITTINGS FOR PIPES LIGHTING MEANS FOR THERMAL INSULATION IN GENERAL MECHANICAL ENGINEERING PIPES SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING THERMAL INSULATION IN GENERAL WEAPONS
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