One -way valve of suppressing

The utility model discloses an one -way valve of suppressing, this one -way valve of suppressing include barrel and the piston of sealed assembly in the barrel, piston lower extreme spiral is equipped with and is used for adjusting its adjusting device of position from top to bottom, be equipped wit...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	WANG JIAN, YU TIEJING, YANG BAIYANG, DONG JUNFENG, JIAO MINGYUAN, CHEN JING
Format:	Patent
Sprache:	eng
Schlagworte:	EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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