The improved design is increased in the fixed mold core, which change first parting into second parting and demould the inverted cone mandatorily.

该改进设计主要是在定模部分增加型芯，并将一次分型改成二次分型，再使倒锥部分实现强制脱模。

youdao

The bottle is a direct copy from the archives, with an inverted cone-shape base and a taller-than-average brush handle.

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Their final design of the QSST jet is reminiscent of Concorde in its delta wing shape, but with a number of unique features, including an "inverted V-tail" and tailored nose cone.

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