求翻译：5. 针对产品品种发展和保证产品质量的需求，有计划地进行技术改造、设备更新。 而液压产品的发展方向主要是：1.节省能耗，提高效率2.用AC电机或变频电机驱动定量泵。3.发展机电一体化元件和系统。4.发展具有比例阀的耐污染和伺服阀高精度、高频响的直动型电液控制阀。5.发展内置电子系统的电液伺服比例元件、电磁阀、液压定位油缸等。是什么意思？

For the development of product variety and to ensure the product quality requirements, there are plans to carry out technological transformation and equipment renewal. Direction of development of hydraulic products are mainly: 1. To save energy consumption, improve efficiency 2 ac motor or inverter

5.for product development and quality assurance of its products, the need to be systematically updated technology, and equipment. When the hydraulic products of the direction of development is mainly: 1.save energy consumption and increase efficiency to 2.using AC motor or va