Key Technologies of Roof Comb Type Directional Drilling in Pre-driving Roadway of
Sangshuping No.2 Coal Mine
YANG Zhe
LI Zijian
LI Peng
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Publication Date：2020-08-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 96-99 )