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HB 8234-2002MJ螺紋六角厚自鎖螺母Self-locking hexagon thick nuts with MJ thread
2022-06-12
我國厚煤層采煤技術(shù)的發(fā)展及采煤方法的選擇
2020-09-18
Structural and micro structural studies of PbO-doped SnO2 sensor for detection of methanol,propanol
2020-07-08
Theoretical analysis on water-inrush mechanism of concealed collapse pillars in floor
2020-07-08
Huge thick conglomerate movement induced by full thick longwall mining huge thick coal seam
2020-06-12
A New Accumulation Model of Coal Seams in France Extensional Basins
2020-06-12
Top coal flows in an excavation disturbed zone of high section top coal caving of an extremely steep
2020-06-12
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