payment to visiting residential areas, student hostels, hotels and other places, often need to face scan. this technology has even been used to solve a chronic problem for decades, namely the frequent theft of the beijing temple of heaven toilet paper. these public lavatories now have automatic paper dischargers...
. production efficiency can be improved if the reduction temperature is lowered. this can be achieved by changing the equilibrium conditions and increasing the reduction rate. one way in this direction is to use methane-containing gas, which offers more favourable thermodynamics in comparison with solid...
the power from one kilogram of uranium is approximately equivalent to gallons of oil, ton of coal, or cubic feet of natural gas . operation of a nuclear plant generates to permanent jobs, which on average pay a percent higher wage than other regional jobs. zero carbon emissions in contrast to fossil fuel...
february this year, deutsche lufthansa ag signed a letter of intent with raf nerie heide (heide re nery) for the production and use of environmentally friendly synthetic kerosene. last october, virgin atlantic said it had teamed up with american bioengineering rm lanzatech to create renewable jet fuel...