The design of D-shape shearing bolts in high-pressure sealing structure was discussed and compared with the design of tensile bolt and general shearing bolt.

探讨了高压密封结构中D形抗剪螺栓的设计，并与普通拉伸螺栓、一般抗剪螺栓的设计进行了比较。

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In this paper, microstructure D-shape and hexagon inner cladding ytterbium doped fiber was designed and fabricated based on requirements of high power fiber laser.

文章作者根据高功率光纤激光器的性能要求，设计和制备了内包层为D形和六边形的微结构掺镱双包层光纤。

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The researchers managed all this by tapping what are known as diffraction fringes to create an object's 3-d shape.

科研人员是如何做到这一切的呢？他们利用衍射条纹来产生一个物体的3d轮廓。

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And Ruijssenaars found one in the D-Shape.

CNN: Architect to build home using 3-D printer

The consortium tested the practicalities of using a printer on the Moon by setting up a D-shape 3D printer, which are used to print very large house-sized structures, in a vacuum chamber with simulated lunar material.

BBC: 3D printed moon building designs revealed

If a B737-800 was morphed into the shape of one of the D-series of aircraft on which Mark Drela is experimenting in MIT's wind tunnel, then it would be about the same size, could fly the same routes and would carry a similar number of passengers.

ECONOMIST: The aircraft of the future