The invention provides a method of manufacturing a magnesium sulphate product, and a crystalline product comprising magnesium sulphate in the form of crystal or granules. A power generation system contained within the airship’s interior supplies the energy for it’s display, propulsion, flight control and other onboard devices. If the selected flow distribution rule is from the Inter-APN flow distribution container, then performing, by the multi-homed terminal, a second round of rule evaluation to select an access technology for performing flow distribution. A housing body which has a housing upper face is molded around the semiconductor chip andor around the sacrificial layer in a lateral direction parallel to the radiation outlet face. A linking-up body is axially extended from the rotating plate, and has a first guiding protrusion.