PDE=Partial Differential Equation 偏微分方程PDabbr.螺纹中径(=pitch diameter)abbr.邮区(=postal district)Pdchard Rorty罗蒂PD Estimation违约率估计PD measurement局部放电试验PDP television等离子电视PDC discounting远期支票贴现Pd - Ag alloy钯-银合金PD radar seeker脉冲多普勒雷达导引头Pd - C catalyst钯碳催化剂pDecoction of GYD骨炎定Pd/BC catalyst钯／竹炭催化剂