AIRTIGHT PACKING AND JOINT FOR CONNECTING ACTIVATING ROD OF EXCAVATOR

The present invention relates to airtight packing and a joint for connecting a drilling rod of an excavator. The joint comprises: a male joint; and a female joint. A plurality of pneumatic supply holes are formed at constant intervals in an upper end of the female joint and the upper end of the male...

Ausführliche Beschreibung

Bibliographische Detailangaben

1. Verfasser:	SHIN, YOUNG CHOL
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	EMBANKMENTS EXCAVATIONS FIXED CONSTRUCTIONS FOUNDATIONS HYDRAULIC ENGINEERING SOIL SHIFTING UNDERGROUND OR UNDERWATER STRUCTURES
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