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elements of centering
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elements of centering
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elements of centering
归心元素
仪器、照准目标和标石的中心在水平面上投影间的距离及其与零方向的夹角。测站点归心元素包括测站点偏心距与偏心角;照准点归心元素包括照准点偏心距与偏心角。
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Air Pollution Control
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Air Pollution Control Law
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air pollution prevention and control of collection and distribution system for the ports
air pollution prevention and control of two pollution control zones
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airport cargo area
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