The methods of thermal spray and mechanical ball milling are combined in this paper and a new method of preparation of Cu-Zn ultrafine powders is brought forward.

本文将热喷涂法与机械球磨法相结合，提出一种新的超细铜锌粉末的制备方法。

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The methods of thermal spray and mechanical ball milling were combined in this paper and a new method of preparation of ultrafine Cu-Zn powder was brought forward.

本文将热喷涂法与机械球磨法相结合，提出一种新的超细铜锌粉末的制备方法。

youdao

Sealing surfaces are spray carbide, with corrosion, abrasion, erosion, etc. , long life, can pass the ball clean wool pipeline and other characteristics;

密封面均喷焊硬质合金，具有防腐、耐磨、耐冲蚀等优点，使用寿命长、可通毛球清扫管线等特点；

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United needed a creative player in the same mould as the suspended Paul Scholes, whose ability to spray the ball around and get forward from midfield was badly missed.

BBC: Aston Villa 2-2 Man Utd

Mark Twain famously described golf as a good walk, spoiled, but if you find no other enjoyment in a round, it can provide a lovely 4-mile walk (more if you spray the ball).

FORBES: 11 Ways to Save Money on Golf

Police in riot gear responded with "blast ball" grenades that release smoke laced with pepper spray.

BBC: Eighteen arrested as Seattle May Day rally turns violent