<chr_abbr type="frq" class="ss" expan="et" cert="yes">et1</chr_abbr> tant <chr_var letter="s" var="long">∫</chr_var>acie<chr_var letter="s" var="long">∫</chr_var> <chr_abbr type="reg" class="dc" expan="uus" cert="no">u-nine</chr_abbr> b<chr_abbr type="reg" class="dc" expan="" cert="no">n-hbar</chr_abbr> defi 