export of raw material造句

we are a trading company in seoul, korea as specialized in import and export of raw materials or products for semi-conductors, electronics, ceramics and industries etc
我们是韩国汉城的一家贸易公司,是专业的进口和出口用于半导体,电子,制陶业和工业的原材料和产品
invisible trade can be as important to some nations as the export of raw materials or commodities is to others . in both case, the nations earn money to buy necessities
无形贸易对一些国家来说很重要，就象另一些国家出口原材料或商品的重要性一样。国家在从事无形贸易或有形贸易中，都能赚取外汇去购买他们的必需品。
It's difficult to find export of raw material in a sentence. 用export of raw material造句挺难的