<chr_abbr type="frq" class="ss" expan="et" cert="yes">et1</chr_abbr> di<chr_var letter="s" var="long">∫</chr_var>t <chr_abbr type="reg" class="dc" expan="que" cert="no">q-hbar</chr_abbr> tre<chr_var letter="s" var="long">∫</chr_var>tot <chr_var letter="s" var="long">∫</chr_var>on tal<chr_abbr type="reg" class="dc" expan="an" cert="no">a-hbar</chr_abbr>t 