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nitrogen seal
氮封
利用氮气将物料与空气隔离开,以防止物料与空气中某些组分接触后性状发生改变的方法。
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Site of Tuci Shipwreck of the Ming Dynasty at Xiangshan
Site of Tunnel Warfare of Jiaozhuanghu
Site of Undergraduate College of Imperial University of Peking
Site of Union Medical College
Site of University of Nanking
Site of War Criminals Management Insititute
Site of Wenxingxiang Business Firm
Site of Wunvshan Mountainous City
Site of Wu palaces and gardens on Lingyan mountain
Site of Xanadu World Culture Heritage
site of Yanji Border Supervision Office
Site of Yinshan Homo sapien
Site of Yuanmou Man
Site of Yuan shipwreck at Sandaogang of Suizhong
site of Zhijiang University
Site of Zhiyuan Battleship at Dandong
Site of Zunyi Conference
site percolation
site percolation process
site performance training
site pipeline
site pipeline synthesis
site plan
site point connection-based drug design
site point connection method
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