最近，航天总公司４３所研制开发的“复合材料井盖”通过了由西安市科学技术委员会主持的新产品鉴定。与会专家一致认为，复合材料井盖结构设计合理，制造工艺规范可行，生产设备和检测手段配套完整，具有批生产能力。复合材料井盖是４３所为解决国家某重点型号产品在研制... Recently, the “composite manhole covers” developed and produced by the 43 space companies have passed the new product appraisal hosted by the Xi’an Science and Technology Commission. Experts at the conference unanimously agreed that the design of the composite well cover structure is reasonable, the manufacturing process is standard and feasible, and the production equipment and detection means are complete and complete, with a batch production capacity. Composite manhole cover is 43 to solve the country a key model product in the development...