<em>Aem>、<em>Inem> <em>aem> two-stroke/cycle eng<em>inem>e, the r<em>inem>gs run hotter, requir<em>inem>g the end g<em>aem>p to be gre<em>aem>ter B、Some provision must be m<em>aem>de <em>inem> <em>aem> two-stroke/cycle eng<em>inem>e to keep the r<em>inem>gs from b<em>inem>d<em>inem>g <em>inem> the ports C、No g<em>aem>p is required to exist between the ends of the r<em>inem>g when cold <em>inem> <em>aem> two-stroke/cycle eng<em>inem>e, but <em>aem> sm<em>aem>ll g<em>aem>p is required <em>inem> <em>aem> four-stoke/cycle eng<em>inem>e D、The g<em>aem>ps should be st<em>aem>ggered on either side of <em>aem> piston <em>inem> <em>aem> two-stroke/cycle eng<em>inem>e, while st<em>aem>gger<em>inem>g is not necess<em>aem>ry <em>inem> <em>aem> four-stroke/cycle eng<em>inem>e