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The valve is the opening type. The material is in the state of circulation.
棒条闸门一般为常开型，物料处流通状态。
youdao
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School age period was period of high circulation of type 1 DM.
经常吃蔬菜是1型糖尿病的保护因素。
youdao
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School age period was period of high circulation of type 1 DM.
经常吃蔬菜是1型糖尿病的保护因素。
youdao