In 1977 the Clean Air Act was amended by the addition of several relief provisions for stationary sources unable to meet statutory deadlines for compliance with emission limitations.
1977年，《洁净空气法案》又被修正，增加了几条法律补救方法条款，对象就是那些在法定的最后期限还不能遵守排放限制的固定污染源。
In 1977 the Clean Air Act was amended by the addition of several relief provisions for stationary sources unable to meet statutory deadlines for compliance with emission limitations.
1977年，《洁净空气法案》又被修正，增加了几条法律补救方法条款，对象就是那些在法定的最后期限还不能遵守排放限制的固定污染源。
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