由两个有相同行使价的看跌和看涨期权形成的组合，同时二者都看跌，叫做组合卖出期货。
A combination of a put and a call with the same strike price, in which both are bullish, called synthetic long futures.
公司的主导产品铝合金三价铬钝化剂、高温封闭剂、除渍去灰剂等已达到同行业国际先进水平。
Our new products have already been reached the advanced international level. Products include: trivalent chromate passivation, high temperature sealant, and desmutting agent.
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