NB/T 47065.1  支座 BⅠ 600 f/forumа Т а в’а т€™а’ТЗа Т аВв–вЗа т€™а’ТАа Т а в’а аŽаЂТЛа Т аВв–вЗа т€™а’Т а Т а в’а т€™а’ТЗ