The fun of discovery at the beach is enhanced by the tear-out shell identification card in the back of the book.
撕下本书最后面的贝壳名称卡片有助于提高孩子们在海边探索的乐趣。
The serious damage accidents induced by the out shell and ceramic bearing fracture of circulating pump in 660 MW thermal power plant have lead to great losses.
某超超临界660MW机组发生循环水泵外筒体断裂脱落、陶瓷轴承损坏的事故，造成重大损失。
The serious damage accidents induced by the out shell and ceramic bearing fracture of circulating pump in 660 MW thermal power plant have lead to great losses.
某超超临界660MW机组发生循环水泵外筒体断裂脱落、陶瓷轴承损坏的事故，造成重大损失。
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