simple metal
2.BPEC handrail, a new type compositive handrailing which hollow ball, metal stucture, Its stanchion is set up with several metal hollow balls and pipc through welding, The composition at worksite is very simple and easy without any welding, economic &fine outlook, stable, convenient for installing and separaing.
3.The PSPICE(Personal Simulation Program with Integrated) simulation at the MOS(Metal-Oxide Semiconductor) transistor lever is carried out and results show that the proposed filter has the advantage such as simple structure,suitable for fully integration.
4.Rainwater is not clean water, because adulterated air pollution content, still have the pollution of the ground and roofing, nitrogen of ion of yin and yang, heavy metal, ammonia often is contained to wait in collection rainwater, a lot of people fear such water passes simple processing, whether humanness is drinkable.
