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Two test methods - the moire method and the photographic method were used.

采用了云纹干涉术和普通照相法这两种试验方法。

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Liquid flow rate and bubble size have been determined by photographic method.

用照相法测定液体流速及气泡直径。

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Liquid flow rate and bubble size have been determined by photographic method.

用照相法测定液体流速及气泡直径。

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