... ultrasound delay line 超声延迟线 ultrathin membrane 超薄膜 ultratrace impurity 超痕量杂质 ...
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ultrathin composite membrane 超薄复合膜
ultrathin cellulose acetate membrane 超薄醋酸纤维膜
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SOFCs create electrical energy via an electrochemical reaction that takes place across an ultrathin membrane.
FORBES: Harvard Researchers Develop Fuel Cell Chip
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