3．環保工程 人口劇增，工業生產迅猛發展使得環境嚴重惡化，已經達到危險的程度，國家把可持續發展列為國策，它將是二十一世紀的大課題。空氣污染、水污染要得到控制必須加強管理，而管理的基礎是污染量的定量控制。我國是以煤為主要能源的國家，全國有上百萬的煙囪日夜不停地向大氣排放濃煙，煙氣排放控制成為根治污染的重要項目。美國已經立法規定煙廢氣排放標準，每個煙囪必須安裝煙氣分析儀和流量計，組成連續排放監
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