There are many foreign tire excavator manufacturers and the series is complete. Such as Germany Liebherr, snow-fu, Japan's Komatsu, Kobelco, Caterpillar, Volvo Sweden, France MecalasS.A, the British company JCB, Daewoo, Hyundai and so on. The products of these companies basically reflect the highest level of development of tire excavator technology in the world today, and many famous companies have their own key technologies and components. Liebherr Germany produces A308 (8.9-10.3t class) to A934Litronic (23t class) tire excavators. Its products, such as the A316Litronie excavator, in addition to the characteristics of the brand-name products currently produced and sold in the Chinese market, also have advanced features not available in other products: 1. Light weight, low power, large digging force and crushing force, high productivity. 2. For the rotary closed circuit of the rotary device, the inertia function of the rotary brake is recovered and reused for the lifting of the working device. 3. All electronic control. Liebherr LSC electronic limit load regulation know-how with pressure compensation and flow compensation. Sets various working modes such as enhanced power block, high power block, economic gear, fine gear, ultra-precision control switch, LCD display, sound and light alarm, and sensor control engine idle speed. 4. Quickly configure the joints of various working devices. The standard configuration is used for a variety of working conditions. The legs can be selected to control separately. The comfortable operating environment is also unique in the same industry. Other foreign brands of excavators also use electronic energy-saving and microcomputer control technologies developed independently, such as Japan's Komatsu patent pressure compensation CLSS system, Kobelco's advanced ITCS computer control system, CAT's fuzzy logic control system, South Korea's Daewoo company alone Some EPOS automatic control systems, Easl-DriVe electronically controlled hydraulic control system installed by France MecalasS.A company, Volvo's all-round advanced ACS control system and built-in Con-tronic mode selection system. These control systems basically have a variety of power (work) mode selection, instantaneous boost function, engine automatic idle speed, engine work automatic warm-up and overheat protection, real-time electronic monitoring and self-diagnosis function, thereby improving the efficiency of the excavator and reducing Fuel consumption , improve the driver's working environment and improve the automation of the machine. It can be seen that these products have excellent performance in energy saving, environmental protection, safety and informationization while ensuring the advanced performance and high reliability of the whole machine, leading the trend of tire excavator technology development. It provides Steel Pipe sleeves for all pipes passing through concrete or masonry structures. An excellent choice for installations where the Modular Seal and Sleeve assembly would be subject to extremely high temperatures or where fire seals are specified. Steel Wall Sleeves available in Painted or Galvanized; Steel Collar; Continuous Weld-Bead on both sides of collar. Steel Sleeve,Steel Sleeve Structural,Steel Construction Material,Subway Accessory Steel Sleeve Anshan Lijian Engineering Group Co. LTD , https://www.lijianformwork.com