B <chr_abbr type="reg" class="dc" expan="" cert="no">n-hbar</chr_abbr> <chr_abbr type="frq" class="ss" expan="est" cert="no">est</chr_abbr> garde<chr_var letter="s" var="long">∫</chr_var> <chr_abbr type="frq" class="ss" expan="et" cert="yes">et1</chr_abbr> m<chr_abbr type="reg" class="dc" expan="an" cert="no">a-hbar</chr_abbr>tenu<chr_var letter="s" var="long">∫</chr_var> 