Whakaahuatanga Poto:

Ko te raupapa HWS21-63 tētahi o ngā parepare kati aunoa kua whakawhanakehia, ā,i hangaia e sinoasian

hangarau, e tuku ana me ngā mahi maha (te hiko i raro i te mana, te iahiko nui, te turuturu whenua, te tino

(whakaatu, hono anō aunoa me ngā tawhā whakarite) i roto i te 40-60Hz, e whakamahia whānuitia ana i roto i ngā taiao o

hiko, ahumahi me te tauhokohoko