L e <chr_var letter="s" var="long">∫</chr_var>anc dou uen<chr_abbr type="reg" class="sc" expan="tre" cert="no">t-e</chr_abbr>. <chr_abbr type="frq" class="ss" expan="et" cert="yes">et1</chr_abbr> <chr_abbr type="reg" class="dc" expan="" cert="no">m-hbar</chr_abbr>iucent. 