... falling, high working efficiency, shorten the operation period. SQH400 Crawler-type Dynamic Compactor Performance Advantage=Unhook to falling, high working ... & Engine Adopt lengthened 55Tcrawler retractable chassis institution, the working crawler length is 6000mm, width is 4450mm; the complete machine with ... seat,radio,air conditioner and comfortable operation. SQH400 Crawler-type Dynamic Compactor