Deviational survey hole drill way protection device

The utility model belongs to the safety monitoring field specifically discloses a simple to operate and has protected the better deviational survey hole drill way protection device of effect. This deviational survey hole drill way protection device, including the cylindric safety cover and with the...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	CAI DEWEN, RUAN YANSHENG, CHEN XIAOPENG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS PHYSICS TESTING
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