Openable floor hole protection device

The utility model discloses an openable floor hole protection device which comprises a lining cylinder extending into the end of a floor hole, a neck bush is sleeved outside the lining cylinder, the circumferential outer wall of the neck bush is matched with the inner wall of the corresponding posit...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	ZHAO QIANG, GAO MEILI, JIAO JIANGBO, ZHAO YANG, CUI LINA, TONG ZHANKUN, LI MENGTING, ZHAO CHUAN, YAO WENJING, ZHANG TIANTIAN, LIU SHIHAO, JIAO XINGANG, WU YUEMEI, WANG CHAO, LI XI, ZHAO ZHIHUI, DONG BO, CAO FUSHUN
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BUILDING BUILDING IMPLEMENTS OR OTHER BUILDING AIDS, OR THEIRUSE FIXED CONSTRUCTIONS FORMS HANDLING BUILDING MATERIALS ON THE SITE REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTINGBUILDINGS SCAFFOLDING SHUTTERING
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