国家将重点发展五十类产品最近，国家有关部门选择一批产品作为重点产品，列为优先支持发展对象。这些产品共有５０大类，分别是：一、属基础件九类：轴承、气动元件、密封件、粉末冶金制品、液压件、模具、低压电器、电力电子器件和装置、仪表元器件；二、属基础机械十类... The state will focus on the development of 50 types of products. Recently, the relevant state departments have selected a group of products as key products, which are listed as priorities for supporting development. There are 50 categories of these products, namely: First, nine types of basic components: bearings, pneumatic components, seals, powder metallurgy products, hydraulic parts, molds, low-voltage electrical appliances, power electronic devices and devices, instrumentation components; Second, Ten types of basic machinery...