I kēia mau lā, ua hana mākou i ka Nondestructive inspection penetrant test (PT) no ke kiʻekiʻe chrome alloy casting e like me nā koi o ka mea kūʻai aku,ʻanuʻu he as hahai：
1. E hoʻomaʻemaʻe i ka ʻili i hana ʻia
2. E pīpī i ka ʻulaʻula penetrant
3. E hoʻomaʻemaʻe i ka ʻulaʻula penetrant
4. E pīpī i ka mea hoʻomohala keʻokeʻo, ʻaʻole ʻike ʻia ka mea hoʻomohala keʻokeʻo ʻulaʻula, no laila ʻaʻohe hemahema o kēia hoʻolei ʻana.