It is proved by field test that the method is economical, able to reduce labor intensity and to get a good result.

经矿场试验证明，该技术既经济又可降低工人劳动强度，防垢效果也较理想。

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It is proved by field test that the method is economical, able to reduce labor intensity and to get a good result.

经矿场试验证明，该技术既经济又可降低工人劳动强度，防垢效果也较理想。

youdao