paddle 桨叶pair force 偶力pair interaction 偶相互酌pair of element 运动副pair potential 对势pancaking 平坠panel point 格点parabolic creep 抛物线型蠕变parabolic curve 抛物曲线parabolic flow 抛物线型流parabolic orbit 抛物线轨道parabolic potential 抛物线型势parabolic trajectory 抛物线轨道parabolic velocity profile 抛物线速度剖面paraboloid of revolution 回转抛物面parabrake 制动伞paraclase 断层裂缝paraelastic resonance 顺弹性共振parallactic angle 视差角parallactic shift 视差移动parallel 平行的parallel band 平行带parallel chord truss 梯形桁架parallel connection 并联parallel coordinate system 平行坐标系parallel coordinates 平行座标parallel displacement 平行位移parallel excitation 并励parallel exis theorem 平行轴定理parallel field of forces 平行力场parallel flow 平行流parallel flow turbine 轴两涡轮parallel force 平行力parallel force system 平行力系parallel line 平行线parallel motion 平行运动parallel resonance 并联共振parallel shift 平行位移parallel stream 平行流parallel structure 平行结构parallel texture 平行织构parallelepipedal deformation 平行六面体形变parallelism 平行性parallelogram law 平行四边形定律parallelogram of forces 力平行四边形parallelogram of velocities 速度平行四边形parallelogram pendulum 平行四边形摆paramagnetic resonance phenomenon 顺磁共振现象parameter 参量parameter change 参量变换parameter curve 参数曲线parameter of velocity 速度参数parameter scattering 参量散射parameter transformation 参量变换parametric oscillation 参量振荡parametric resonance 参量共振parametron oscillation 变参管振荡parasite drag 寄生阻力parasitic drag 寄生阻力parasitic oscillation 寄生振荡parasitic resonance 干扰共振parasitics 寄生现象parent metal 底层金属paris formula 帕里斯公式partial air force 空气动力导数partial analysis 部分分析partial coherence function 部分相干函数partial correlation 部分相关partial cross section 部分截面partial deformation 部分形变partial diffusion coefficient 部分扩散系数partial energy 偏能partial entropy 偏熵partial equilibrium 部分平衡partial excitation 部分激发partial internal energy 偏内能partial ionization 部分电离partial load 部分负载partial luminous flux 部分光通量partial node 分节点partial potential 偏势partial pressure 分压partial pressure grade 分压梯度partial pulse 部分脉冲partial resonance 部分共振partial scattering cross section 部分散射截面partial vibration 部分振动partial wave 分波partial wave method 分波法particle 粒子particle acceleration 粒子加速particle displacement 粒子位移particle dynamics 质点动力学particle flow 粒子流particle momentum 粒子动量particle size distribution 颗粒尺寸分布particle trajectory 粒子轨道particle wave function 粒子波函数particulate fluidization 散体连化partition 分离partition law 分布律partly dispersed shock 部分分散冲击pascal law 帕斯卡尔定律paschens law 帕邢定律pass band 通带pass band damping 通带衰减passage 练passage of front 锋面通过passivation 钝化passivation potential 钝化势passive earth pressure 被动土压力passive gravitational mass 被动引力质量passive mass 被动质量passive slip plane 被动滑移面passive state 钝态passivity 钝态path amplitude 径迹幅度path contraction 路径缩短path inclination 轨道倾角path length 路径长度path line 轨迹path time law 路径时间定律pathway 轨道pattern 图样payload 有效载荷payload ratio 有效载荷比peak frequency deviation 频率最大偏差peak load 峰值载荷peak output 最大功率peak shear strength 峰值抗剪强度peak to peak amplitude 峰峰振幅peak value 峰值peculiar minor planet 奇特小行星peculiar motion 本动pedestal 台pedomechanics 土壤力学peierls lattice force 佩尔斯点阵力peierls nabarro force 佩尔斯点阵力peierls potential 佩尔斯势peierls stress 佩尔斯应力pellicular water 薄膜水pelton turbine 培尔顿水轮机penalty function 罚函数pendular motion 摆运动pendular oscillation 摆振动pendulum 摆pendulum balance 摆秤pendulum deflection 摆幅pendulum effect 摆效应pendulum governor 摆式蒂器pendulum hardness 摆撞硬度pendulum hardness test 摆撞硬度试验pendulum hardness tester 摆撞硬度试验机pendulum impact tester 摆式冲辉验机pendulum law 摆定律pendulum manometer 摆式压力计pendulum motion 摆运动pendulum suspension 摆式悬挂penetrant method 透过法penetrating power 贯穿本领penetration 浸透penetration depth 浸透深度penetration resistance 穿透阻力penstock 压力水管percent consolidation 压密度percentage reduction of area 断面收缩率perch 杆percolation 渗透percolation coefficient 渗透系数percolation rate 渗透率percolation velocity 渗透率percussion 冲击percussion test 冲辉验perfect combustion 完全燃烧perfect diffusion 完全扩散perfect dislocation 全位错perfect elasticity 完全弹性perfect flexibility 完全挠性perfect fluid 理想铃perfect fluidity 理想怜性perfect gas 理想气体perfect overflow 完全溢流perfect pendulum 单摆perfect plasticity 完全塑性perfect resonance 理想共振perfect rigidity 完全刚性perfectly elastic 完全弹性的perfectly elastic body 完全弹性体perfectly elastic impact 完全弹性碰撞perfectly elastic material 完全弹性材料perfectly elastic torsion 完全弹性扭转perfectly inelastic collision 完全非弹性碰撞perfectly inelastic impact 完全非弹性碰撞perfec