ʻO kaʻenehanaʻo MultiLayer e hōʻoia nei i kaʻenehana e hoʻomaikaʻi ana i ka hana hoʻoweliweli ma keʻano he nui a me nā pou.
Ua hoʻomakaʻo Microwrove Nondastructive Technology ma ka makahiki 1960. ʻO MicrowWeve Nonstructructive Technology e hoʻowalewale i nā nalu electroate electroacnetic o kekahi mau huakaʻi i kahi ghzmhz3300 ~ 330 i ka mea e ho'āʻoʻia.