S ir<chr_abbr type="reg" class="dc" expan="on" cert="no">o-hbar</chr_abbr><chr_var letter="s" var="long">∫</chr_var> a<chr_abbr type="reg" class="dc" expan="" cert="no">p-hbar</chr_abbr><chr_var letter="s" var="long">∫</chr_var> le <chr_abbr type="frq" class="ct" expan="cheualier" cert="no">ch[apost]r</chr_abbr> 