There were statistical differences between the adult group and the pediatric group in ethmoid bulla hypertrophy and middle nasal concha etherealization.
Underground coal gasification is implemented under changefully natural environment which is difficult and complicated to execute,so scientific safety preventive measures should be adopted.
Co-gasification of Huainan coal, waste wood and waste polyethene (PE) to produce fuel gases with high H2 was carried out on a fluidized bed reactor in out laboratory.