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。
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。
Although over the years Barbie has had more than 180 different careers—including football coach, sign language teacher, ambassador, president and astronaut—her body shape hasn't changed much.
尽管这些年来芭比娃娃有超过180种不同的职业，包括足球教练、手语教师、大使、总统和宇航员，但她的体型并没有太大变化。
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