농도 분석 결과 20시간 수소 환경에 노출된 시험편의 수소 농도만 원재에서 검출된 수소 농도값보다 높게 나왔다.
As a result of the concentration analysis, only the hydrogen concentration of the test specimen exposed to the hydrogen environment for 20 hours was higher than the concentration of hydrogen detected in the raw material.