Change annular BOP packing.

更换万能防喷器胶芯。

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The progress in FCC stripper, including he flowing behavior of gas - solid in baffles stripper, annular stripper and packing stripper, was introduced.

摘要介绍了近年来催化裂化装置汽提器的研究现状，主要包括档板汽提器的气固流态化行为，环流汽提器和填料型汽提器。

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The utility model belongs to a packing plastic packing bag, and particularly relates to an annular folding plastic packing bag suitable for continuously packing objects under a specific environment.

本实用新型属于包装塑料包装袋，特别是适合在特定环境下连续包装物体的 一种环形折叠塑料包装袋。

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