PN：0210310001
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Description: DRAG BIT: A kind of drill head that use earliest in the rotary drilling, which is of simple structure, convenient manufacture and low costs. Higher mechanic drilling speed and headway per drill bit can be achieve only by drilling in the loose or soft ground. The DRAG BIT can be divided into four parts: the above bit body, the bottom bit body, the king-wring and the hydrophthalmia etc. The working principle: squeezing and breaking up the rock by cutting and shearing. Details:
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No.1, Bei Yi Xiang, Damucang Hutong, Xidan, Beijing P.R.C.100032
Copyright © 2009 China Educational Instrument & Equipment Corp. All rights reserved.
Damucang Hutong, Xidan, Beijing P.R.C.100032
