求助一句关于型式试验的英文翻译? the purpose of these tests is to evaluate the valve's operating and sealing performance 这些试验的目的是为了评估在设计参数范围内该阀门的操作和密封性能, within the design range determined by the full pressure-temperature envelope of the valve. 而设计参数范围取决于阀门固有的温压曲线查看更多