·Center for Rock Instability and Seismicity Research

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Patents

全长多点楔胀式管缝锚杆

Release time:2021-09-14 Hits:
Type of Patent:
国家发明专利
Application Number:
ZL02109591.4
Service Invention or Not:
no
Application Date:
2002-04-29
Authorization Date:
2004-09-15
First Author:
tangchunan