PN：0210140003
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Description: Back off spear is the back off workover tool which expends and looses the falling fish depending on the relative movement of the pyramidal face between the cavain and the anchor rod and depending on the torque between key and key.It can demonstrate the work principle and the structure composition, and may carry on disassemble and assemble training. 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
