F orce <chr_abbr type="frq" class="ss" expan="et" cert="yes">et1</chr_abbr> hardi<chr_abbr type="reg" class="dc" expan="" cert="no">m-hbar</chr_abbr><chr_var letter="s" var="long">∫</chr_var> l<chr_abbr type="" class="" expan="" cert="no">[apost]</chr_abbr>ep<chr_abbr type="reg" class="dc" expan="re" cert="no">[apost]</chr_abbr><chr_var letter="s" var="long">∫</chr_var>i<chr_var letter="s" var="long">∫</chr_var>t 