以下为句子列表：
英文: The valve has the features of simple structure, free operating, good sealing, little in local resistance losing, quick cut-off, convenience in maintenance and hard to distortion etc.
中文: 该产品具有结构简单，操作自如，密封性能优良，局部阻力损失小，切断快，维护保养方便，不易变形等特点。
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