Added two new extraction rules to clsConditionExtractor: - azxs (安装形式): Extract installation form code from InstallForm field - bkxs (表壳形式): Extract shell form code from ShellForm field Examples: - azxs: A0 (径向无边), Z0 (中轴向无边) - bkxs: 532 (53=304外壳+安装式, 2=外卡式) These new conditions can now be used in material selection expressions. Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>