Q <chr_abbr type="reg" class="dc" expan="" cert="no">n-hbar</chr_abbr> li ait <chr_var letter="s" var="long">∫</chr_var>on cheual hor<chr_var letter="s" var="long">∫</chr_var> <chr_abbr type="reg" class="sc" expan="tra" cert="no">t-alpha</chr_abbr>it. 