阀键

浪漫主义时期，阀键装置的发明与应用使得小号成为了一件半音化的乐器，其音乐表现力随之得以丰富。

During the Romantic period , the invention of the valve device made the trumpet became a chromatic instrument .

仿真直动式溢流阀瞬态响应的键合图法

Bond graph method for the emulation of direct-acting spillover valve 's transient response

建立了CVT液压系统速比控制阀和夹紧力控制阀的功率键合图模型、数学模型和仿真模型，仿真结果表明速比控制阀和夹紧力控制阀的性能满足CVT液压系统的要求。

The model of power bond , mathematics , simulation of speed tatio valve and clamping force valve is built , The simulation results indicate that peed tatio valve and clamping force valve can fulfil the hydraulic system of CVT .