Anyị ụlọ ahịa shelf bụ nke oyi ekwe ekwe, warara akpaka na-aga n'ihu punching mmepụta akara, na adopts electrostatic ntụ ntụ ntekwasa technology na ike ngwugwu.Anyị na-ahọrọ SPCC ígwè akụrụngwa nke ọma na mmepụta na-arụ ọrụ site ọkachamara ọrụ nke na-ahụ na àgwà inogide na kwụsie ike.Ihe niile dị na shelf dị mma nke ọma, mmiri na-eguzogide na mgbochi nchara na ezigbo mkpuchi ntụ ntụ.A na-ejikarị shelf 5 eme ihe.