<chr_abbr type="reg" class="ss" expan="com" cert="no">com</chr_abbr> <chr_abbr type="reg" class="dc" expan="" cert="no">m-hbar</chr_abbr>t .K. le<chr_var letter="s" var="long">∫</chr_var> a <chr_abbr type="reg" class="ss" expan="com" cert="no">com</chr_abbr>ree<chr_var letter="s" var="long">∫</chr_var> 