<chr_abbr type="frq" class="ss" expan="et" cert="yes">et2</chr_abbr> doner eincoi<chr_var letter="s" var="long">∫</chr_var> <chr_abbr type="reg" class="dc" expan="que" cert="no">q-hbar</chr_abbr> prome<chr_var letter="s" var="long">∫</chr_var><chr_abbr type="reg" class="sc" expan="tre" cert="no">t-e</chr_abbr>. 