永城的面粉销量全国第一，并出口到其他国家，因此，永城有着黑白经济之乡的美称，希望大家有时间到永城做客！
The city always flour sales of the first, and export to other countries, therefore, the city always has black township economy, hope you have time to visit the city always!
牛奶包装黑白膜是一种实用型、经济型和环保型包装。
The black and white film for milk packaging is a kind of practical, economical and environmental friendly packaging.
机械设备办理程度地黑白，将直接影响公路施工地经济效益。
The economical profit of the highway construction is depends on whether the mechanical equipment is good or bad.
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