Current -limiting opening device

The utility model discloses a current -limiting opening device, including turning over the board assembly and turning over the fixed cover of board, wherein, turn over the fixed body that overlaps foroffering circular window on the lateral wall of board, turn over the board assembly including turnin...

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Bibliographische Detailangaben
Hauptverfasser:	LI LUN, TAO LIDA, LI CHUNNING, TIAN SHENGMIN, HUANG DEHUI, ZHANG JIANHUA, WANG YUZHONG, YAO ZHANHUA
Format:	Patent
Sprache:	chi ; 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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