The part quality is hard to reach the product locking requirement when forming the end surface thread after piercing.

用一般先冲孔后压型的方法成形端面螺纹工件，质量很难达到产品锁紧要求。

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The end surface of spiral channel is sealed by welding, therefore the sealing performance is good with reliable structure.

螺旋通道的端面是焊接密封的，密封性能好，结构可靠。

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Our results indicate that there exist the differences of ion flux and dose among the inner, outer surfaces and the end surface of the bore.

计算机模拟结果显示了空心圆管内部、外部及端点表面处的离子流密度分布和注入剂量分布存在很大差异。

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Set the flat end on a perfectly flat surface, and a bubble of air points straight up.

FORBES

Plastic matting is to be installed over the grass surface of the Land's End runway to allow flights to resume between the Isles of Scilly.

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He plays Sam, an astronaut who is nearing the end of a three-year stint on the lunar surface, where he manages the mining of Helium-3, a precious substance that will save the planet Earth.

NEWYORKER: Moon