Underwater full protection device

An underwater full protection device comprises an inner cover, a floor drain body and an O-shaped ring and is characterized in that a circular-truncated-cone-shaped groove is formed in the lower bottom of the inner core, and a butterfly-shaped ring is mounted in the groove. The problems that an exis...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	YU MINGMEI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER FIXED CONSTRUCTIONS SEWERAGE SINKS WATER SUPPLY
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