M el<chr_abbr type="" class="" expan="" cert="no">[apost]</chr_abbr><chr_punc mark="comma" force="" synt="" extra="no">punc1</chr_punc> <chr_abbr type="frq" class="ss" expan="et" cert="yes">et1</chr_abbr>b<chr_abbr type="reg" class="dc" expan="" cert="no">n-hbar</chr_abbr> taillie<chr_var letter="s" var="long">∫</chr_var> 