The tension monitoring system of strands and rope can increase safety property and service life of wire rope by a big margin, and has higher application value.

钢丝绳股绳张力测控系统较大幅度提高了钢丝绳的安全性能和使用寿命，具有较高的实用价值。

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Also, domestic alumina output in 2002 was continuously on the increase, but the alumina imports still increased by a big margin, because of rapid increase of primary aluminum output.

国内氧化铝产量继续增长，但由于原铝产量增长迅速，氧化铝进口量仍大幅增长。

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Also, domestic alumina output in 2002 was continuously on the increase, but the alumina imports still increased by a big margin, because of rapid increase of primary aluminum output.

国内氧化铝产量继续增长，但由于原铝产量增长迅速，氧化铝进口量仍大幅增长。

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