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1. If/when hydrogen embrittlement occurs; If/when it were hydrogen embrittlement
Noun
1. If/when hydrogen embrittlement occurs; If/when it were hydrogen embrittlement
1. if it's the case
1. hydrogen bomb
1. hydrogen (H)
1. not be found
1. If it comes out; When it comes out
1. If/when topped; If/when crowned
1. If/when shown; If/when I show
1. After; When…passes