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On May 27th, 2011, 30 ISXD09 multi-purpose tracked forest fire trucks independently developed by China were formally armed policemen in the Greater Khingan Range Forest Detachment in Inner Mongolia. 
The multi-track firefighting forest fire truck has all-road passing performance and can pass through complex terrain such as swamps, forests, snow, deserts, rivers, and lakes; it is flexible and quick, enabling 360-degree in-situ steering in narrow areas; It can load 3.1 tons of cargo, and it can safely carry 10 people and corresponding tools and heavy equipment. 
The car also has the function of breaking the road in the forest, knocking down the tree with a diameter of 25 cm, rolling the thorn bushes, and quickly opening fire extinguishing channels; with traction rescue and self-rescue ability, it can be 10 tons. The following vehicles are hauled and equipped with on-board fire extinguishing devices so that officers and soldiers can conveniently put out fires on forest and grassland fires. 
With traction rescue and self-rescue capability, traction can be carried out for vehicles under 10 tons. When the vehicle is swamped and the slopes are underneath, the vehicle can perform self-rescue and get out of trouble, and can also drag and remove obstructions. 
The Daxing'anling Forest Detachment in Inner Mongolia is responsible for 10.67 million hectares of forest fire prevention and fire extinguishing tasks and 410 km of Sino-Russian border fire blocking missions in the Greater Xing’an Mountains, Inner Mongolia. After the 30 multi-purpose crawler forest fire trucks are listed, they will further promote the transition from a single conventional fire extinguishing system to a mechanized and informatized combined fire fighting model, thus forming a three-dimensional, multi-level and all-round modern fire fighting operational equipment system. Effectively improve the combat effectiveness of the troops and lay a solid foundation for the troops to quickly and efficiently complete the task of fire fighting operations.
Zinc Alloy Die Casting of Knob have their own purposes, need to meet the performance requirements.
(1) mechanical properties, tensile strength, when the material fracture resistance;Elongation, brittleness and plasticity of the measure;Hardness is the resistance of the material surface is pressed into a hard object or friction caused by plastic deformation.
(2) state of the working environment: temperature, humidity, media contact with the workpiece and air tightness requirements.
(3) precision: accuracy and dimensional stability can be achieved.