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一种用于采煤工作面底板的位移测量器
Release time:2020-10-30  Hits:

Type of Patent:国际
State of Patent:专利撤回
Application Number:200820038422.8
Authorization number:CN 201233230Y
Number of Inventors:1
Service Invention or Not:no
Application Date:2008-06-20
Authorization Date:2009-05-06
First Author:xujinpeng