He tikanga utu hou e pai ana ki te taiao te PCR (Primary charge roller). Ka whakaitihia e tēnei tikanga te whakaputanga o te ozone, ā, ka utu ōrite, kāore he haruru. He whānuitia te whakamahinga i roto i ngā mīhini tā laser me ngā mīhini tārua tere-iti.
