Main features: 1.1 Drive 8X4 special chassis with fine-equipped and high performance, which is supplied with transmission system consisting of international level's parts and components such as Cummins engine with turbo and medium-cool, British Lipe clutch, 7-F gear box, Kessler axles and Steyr big torque transfer shaft being of strong and well-reserved power, which are imported or produced in China by means of advanced technologies at abroad. 1.2 13-tonnage heavy-duty axles developed by ourselves by means of German Kessler technologies are chosen as driving axles, which are equipped with wheel hub reducer, differential gear and differential locks for wheels and axles. 1.3 Lifting operation is actualized by two operating levers under hydraulic piloted proportional control to improve the comfort and reliability of operation. 1.4 Equipped with S-section boom and 2-section jib. 1.5 Adopting PAT load moment limiter with high performance and reliability. Unique structure and advanced technology 2.1 Main boom is made of grade low-alloy and high strength steel with hexagonal profile and big circular are being of great load-bearing capacity, light weight and smooth guiding. 2.2 2-section jib, lattice type changeable cross section structure with fine load-bearing capacity, light-weight, l?, 20?of installing angles can be realized of option. 2.3 Slewing table "Box" type traditional structure with pressed channel steel for upper cover is made of 60kg grade low-alloy and high-strength steel with the stability. 2.4 Telescopic mechanism: adopting mature technologies of combing two single double-acting cylinder with 2 sets of wire rope. The boom section II is telescoped by cylinder No. 1 and the boom section iii, IV, V can realize its synchronous telescoping by combining of cylinder No. 1 and 2 sets of wire rope. This kind mechanism can warrant its compact structure, good technological design and reliable working. 2.5 High position pivot arrangement: High position pivot design makes three main bearing load components of boom, derricking cylinder and slewing table reasonable load-distribution, unique structure and good mould-making. 2.6 Chassis frame: designed by advanced CAD. The structure of "I?type front section and "three boxes" type rear part can ens