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natural sandstone testing
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natural sandstone testing
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射孔质量评价
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natural sandstone testing
天然砂岩试验
采用天然砂岩制成标准试验岩心,经干燥、抽真空、氯化钠溶液(或煤油)饱和后,将岩心固定在橡胶套筒内制成砂岩靶,在常温、一定的压力和介质的井筒中射孔,测量岩心的穿透深度、靶板的穿孔孔径,评价射孔器性能的测试。
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DNA nanovnre
DNA nano wire
DNA nanowire
DNA origami
DNA packaging
DNA photodamage
DNA polymerase
DNA polymerase I
DNA polymeraseⅠ
DNA profile
DNA-protein complex
DNA protein interactions
DNA-protein interactions
DNA rearrangement
DNA recombination
DNA repair
DNA repair enzyme
DNA replication
DNase I footprint assay
DNase I foot-printing
DNA self-assembled nanostructure
DNA sequence
DNA sequence analysis of Chinese herbal medicines
DNA sequence analysis of pharmaceutical products
DNA sequence duplication
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