Due to the limitation of the traditional pickling process, the sulfur content of coking benzene is high, and its market competitiveness is difficult to match that of petroleum benzene.
由于传统酸洗精制工艺的限制，焦化纯苯的含硫量高，其市场竞争力难以与石油苯相匹敌。
There exist some unassailable problems in traditional chrome tanning, such as low exhaustion of chrome, salt pollution from pickling, and time-consuming process, etc.
传统浸酸铬鞣存在着一些不容忽视的问题，如：铬的吸收率低，浸酸时带来的盐污染，鞣制周期长等。
There exist some unassailable problems in traditional chrome tanning, such as low exhaustion of chrome, salt pollution from pickling, and time-consuming process, etc.
传统浸酸铬鞣存在着一些不容忽视的问题，如：铬的吸收率低，浸酸时带来的盐污染，鞣制周期长等。
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