<chr_abbr type="frq" class="ss" expan="et" cert="yes">et2</chr_abbr> cel<chr_var letter="s" var="long">∫</chr_var> auec qui la me<chr_abbr type="reg" class="dc" expan="in" cert="no">i-hbar</chr_abbr>tien<chr_abbr type="reg" class="dc" expan="en" cert="no">e-hbar</chr_abbr>t. 