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Valve core and valve seat or bushing deactivation, valve lever curving and so on. 阀芯与阀座或衬套卡死，阀杆弯曲等。
The corrugated pipe expands and contracts along with valve lever's fluctuation, its highest working pressure is decided by corrugated pipe's pressure resistance intensity and the fatigue strength. 波纹管随阀杆的升降而伸缩，其最高工作压力取决于波纹管的耐压强度和疲劳强度。
A dynamic simulation model of start-up process including fuel pumped section and the dynamic nozzle valve lever, etc. is established for the torpedo thermal power system with pressure adjustment mode. 文中针对使用燃料压力调节供应方式的热动力系统，建立了包括充填集液腔和喷嘴阀杆运动等启动过程动态仿真模型；