弹簧型号 PH37L10；PH50L10；PH62L10；PH62L10-50；PH75L10；PH75L10-NT；PH37L13；PH50L13；PH62L13；PH62L13-50；PH75L13；PH75L13-NT；PH37L15；PH50L15；PH50L15-NT；PH62L15；PH75L15；PH75L15-NT；PH37L18；PH50L18；PH50L18-NT；PH62L1