大枢轴或枢轴板设计，确保球体在高压下具有正确的中心位置，保证阀门良好的操作性能。
A large trunnion or trunnion support design ensures central position of ball under the highest working pressure. This permits ease of operation.
大枢轴或枢轴板设计，确保球体在高压下具有正确的中心位置，保证阀门良好的操作性能。
A large trunnion or trunnion support design ensures central position of ball under the highest working pressure. This permits ease of operation.
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