Just googled something about it but didn't open them.

来源: 于 2010-05-20 11:41:27 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

It seems that "离合音字" and "离合声韵字" are different (at least based some people's view).

So "应行" probably is ok with "离合声韵字".