双语例句
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Measuring valve spool with holes and gaps, valve hole diameter is 50?
测量阀孔和阀芯的配合间隙，阀孔直径为50 ？
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Pneumatic valve works by rotating the valve spool to flow or occlusion.
气动球阀的工作原理是靠旋转阀芯来使阀门畅通或闭塞。
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A proportional valve spool therefore has wider lands with notches cut into the edges.
比例阀阀芯具有比较宽的边缘带有槽口的台肩。
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