D e<chr_var letter="s" var="long">∫</chr_var> <chr_abbr type="frq" class="ct" expan="cheualier" cert="no">ch[apost]r</chr_abbr><chr_var letter="s" var="long">∫</chr_var> <chr_abbr type="reg" class="dc" expan="que" cert="no">q-hbar</chr_abbr> il plu<chr_var letter="s" var="long">∫</chr_var> <chr_abbr type="reg" class="dc" expan="pri" cert="no">p-vbar</chr_abbr><chr_var letter="s" var="long">∫</chr_var>ent 