fix bug: change type to exchange_type
fix bug: change type to exchange_type

alone-walker/BlogSpider,wartalker/BlogSpider,hack4code/BlogSpider,wartalker/BlogSpider,wartalker/BlogSpider,alone-walker/BlogSpider,wartalker/BlogSpider,alone-walker/BlogSpider,hack4code/BlogSpider,hack4code/BlogSpider,hack4code/BlogSpider,alone-walker/BlogSpider