1. The  section of main lifting boom is designed to be U-type. the main boom consists of five main sections,the maximum lifiting height is 44.6m,which shows dynamics performance of  high-tension steel.which trends to be more distributing.its performances of flex resisitane ad anti-rotation are improved significantly
2. The embedded type of slider structure and the overlapping parts of front and rear section of the boom are better power distribution,to some degree,reducing stress concentration at large which imporves the lifiting capacity
3. The normally closed type of slewing brake system,equipment with designed typically rotary buffer valve,which makes things come true,such as fast open or stop  stable buffer when it accelerates to stop
4. Electro-hydraulic proportional  control sysytem adopts pressure compensation load back feed protect the working speed  from the influence of loading change ,workig in good satbility,which makes power loss of system a little

Maintechnical paramets of the mobile crane of QY70U