整装待发俄罗斯莫斯科CTT工程机械展有三台不同型号的变速箱亮相，展示了变速箱在工程机械领域的最新发展和技术实力。

首先，一款液力自动变速箱（ZL50HYT821变速箱）亮相展会。ZL50HYT821变速箱作为一种成熟、稳定的变速箱类型，在工程机械领域具有广泛的应用。它能够通过液力传动实现平稳的换挡过程，提供稳定的动力输出，满足工程机械在各种工况下的需求。ZL50HYT821变速箱的亮相，展示了其在工程机械领域的可靠性和耐用性。其次，一款推土机变速箱（D65变速箱）也参加了展会。D65变速箱以其平顺的换挡过程和良好的燃油经济性而受到关注。在工程机械领域，D65变速箱能够提供连续变化的传动比，使发动机始终保持在最佳工作状态，从而提高燃油利用率和作业效率。D65变速箱的展示，展示了其在提高工程机械能效和降低运行成本方面的潜力。

最后，一款定轴式变速箱（WG180/200）也亮相展会。双离合变速箱通过两套离合器的交替工作实现快速换挡，具有换挡速度快、动力损失小等优点。在工程机械领域，WG180/200变速箱能够提供快速、准确的换挡响应，满足工程机械在复杂工况下的高效作业需求。WG180/200变速箱的展出，展示了其在提高工程机械作业效率和性能方面的优势。

总之，这三台变速箱的亮相展示了变速箱在工程机械领域的最新发展和技术实力。它们各具特点，能够满足不同工程机械的需求，提高作业效率、降低运行成本，推动工程机械行业的持续发展。

Ready to go Three different models of gearboxes were unveiled at the CTT Construction Machinery Exhibition in Moscow, Russia, demonstrating the latest development and technical strength of gearboxes in the field of construction machinery.

First, a hydraulic automatic transmission (ZL50HYT821 transmission) was unveiled at the exhibition. As a mature and stable gearbox type, ZL50HYT821 gearbox has a wide range of applications in the field of engineering machinery. It can achieve a smooth shifting process through hydraulic transmission, provide stable power output, and meet the needs of construction machinery under various working conditions. The debut of the ZL50HYT821 gearbox demonstrates its reliability and durability in the field of construction machinery. Secondly, a bulldozer gearbox (D65 gearbox) also participated in the exhibition. The D65 transmission has attracted attention for its smooth shifting process and good fuel economy. In the field of construction machinery, the D65 gearbox can provide continuously changing transmission ratios to keep the engine in optimal working condition, thereby improving fuel utilization and operating efficiency. The demonstration of the D65 gearbox demonstrated its potential in improving the energy efficiency of construction machinery and reducing operating costs.

Finally, a fixed-shaft gearbox (WG180/200) was also unveiled at the exhibition. The dual-clutch gearbox achieves rapid shifting by alternately working two sets of clutches, which has the advantages of fast shifting speed and small power loss. In the field of construction machinery, the WG180/200 gearbox can provide fast and accurate shifting response to meet the needs of construction machinery for efficient operation under complex working conditions. The exhibition of WG180/200 gearbox demonstrated its advantages in improving the efficiency and performance of construction machinery.

In short, the appearance of these three gearboxes demonstrates the latest development and technical strength of gearboxes in the field of construction machinery. Each has its own characteristics and can meet the needs of different construction machinery, improve operating efficiency, reduce operating costs, and promote the sustainable development of the construction machinery industry.