P ar <chr_abbr type="reg" class="ss" expan="com" cert="no">com</chr_abbr>tenance <chr_abbr type="frq" class="ss" expan="et" cert="yes">et1</chr_abbr>par <chr_abbr type="reg" class="ss" expan="com" cert="no">com</chr_abbr>ti<chr_var letter="s" var="long">∫</chr_var><chr_var letter="s" var="long">∫</chr_var>e 