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Foundry technology of fall ball for sea float device has been introduced.
介绍海洋漂浮装置坠球的铸造生产工艺。
youdao
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To the passengers the ball will appear to float in air.
在乘客看来，球显得悬浮在空中。
youdao
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To the passengers the ball will appear to float in air.
在乘客看来，球显得悬浮在空中。
youdao