Development of sealed pressure maintaining sampling device for deep holes in coal mines
GUO Minggong
ZHANG Pengwei
YU Hong
Keywords：directional long borehole samplingcoal seam gas contentcoal samplingdeep hole samplingpressure maintaining samplingsealed sampling
Publication Date：2023-10-10
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 160-164 )