<正> The composition of coal-derived light oil (IBP-220℃) was separated into 5 fractions by atmospheric distillation and analyzed by gas chromatography/mass sp
<正> Using visual experimental apparatus,one system (T40,1×10~(-3) mol/L,non- added with coal) and another system (T40,2×10~(-3) mol/L,added with coal
<正> Along with the increasing demand for coal and the great importance attached to mine safety,gaining the information of mine surface distortion timely has al
<正> Work face 3312 of coal mining in a colliery was taken as an example in which methane data in a series of locations was analyzed.For the purpose of data ana
<正> A novel thermogravimetric analyzer system of furnace with multiple temperature controller was described,which mainly decreased the analysis cycle duration