自一百万来份工作随着钢煤的黄金时代逝去也一去不复返后，现在的鲁尔区又正从清洁工业中找回失去的那些工作。

Nearly a million jobs have gone since the heyday of coal and steel in the 1950s, but the Ruhr is clawing them back in cleaner businesses.

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本文作者介绍了国外皮革工业的一些最新研究成果，包括清洁工艺、制革污水处理、制革厂管理等方面的最新研究成果。

The author introduced the latest research achievements of feather industry abroad. which are concerned with clean technology, effluent treatment and managing of tanneries.

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详细分析了冶金工业实施清洁工程的技术措施，阐述了确保清洁工程实施的社会环境和战略目标。

Technical measures of cleaning engineering are detailed in this article. The social environment and strategic aim required for implementation of cleaning engineering are explained.

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