Drilling, milling and cutting device in underwater pipe and using method of drilling, milling and cutting device
The invention provides an underwater in-pipe drilling, milling and cutting device and a using method thereof.The device comprises a cutting device, a rotating device and a fixing device, and the fixing device is composed of a supporting hydraulic cylinder, a supporting short arm, an upper flange, a...
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Format: | Patent |
Sprache: | chi ; eng |
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