<chr_abbr type="frq" class="ss" expan="et" cert="yes">et2</chr_abbr> di<chr_var letter="s" var="long">∫</chr_var>t. ua<chr_var letter="s" var="long">∫</chr_var><chr_var letter="s" var="long">∫</chr_var>al g<chr_abbr type="reg" class="sc" expan="rant" cert="no">nt-alpha</chr_abbr> harde<chr_abbr type="reg" class="dc" expan="" cert="no">m-hbar</chr_abbr>t. 