S idure<chr_abbr type="reg" class="dc" expan="" cert="no">m-hbar</chr_abbr>t <chr_abbr type="reg" class="dc" expan="que" cert="no">q-hbar</chr_abbr> il <chr_var letter="s" var="long">∫</chr_var>e pla<chr_abbr type="" class="" expan="" cert="no">[apost]</chr_abbr>it 