... two stage turbine 两级汽轮机 two start screw 双纹螺钉 two stream instability 双柳不稳定性 ...
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双头螺纹 double thread ; Double Start Thread ; two start screw ; DT 双头式 Double heads ; bull-head .
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... 单纹螺纹螺钉 single-threaded screw 双纹螺纹螺钉 double-thread screw; two start screw 槽纹螺旋, 螺槽 flute spiral ...
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two-start screw 双头螺纹
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