<chr_abbr type="frq" class="ss" expan="et" cert="yes">et2</chr_abbr> <chr_var letter="s" var="long">∫</chr_var>on couent e<chr_abbr type="reg" class="dc" expan="in" cert="no">i-hbar</chr_abbr>z <chr_abbr type="reg" class="dc" expan="qui" cert="no">q-vbar</chr_abbr>l <chr_var letter="s" var="long">∫</chr_var>en aut. 