At present, the advanced technology of mechanical seal is the surface shape changed, the combined seal and the controllable mechanical seal.

目前先进的机械密封应用技术主要有表面改形技术、组合密封技术和可控机械密封技术。

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For matching turbine work condition, designed a diffuser that transformed square to round, chose Central Line and shape changed method, defined diffuser expanding Angle.

给出了一种亚音速方转圆扩压器的设计方法，并对中心线形状、型面变化规律和扩张角等进行了选择和说明。

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Piezoelectric materials generate an electric charge when their shape is changed.

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Its shape has changed since the last election.

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Only the ideal female shape has changed.

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