The development of the research of the Van der Waals force, the Coulomb force and the space resistance, which have an important influence on the agglomeration of the ultra-fine powders, is reviewed.

综述了对于超细粉体团聚有重要影响的范德华力、库仑力和空间阻力的研究进展。

youdao

The paper introduces the resistance reduction methods of van type vehicles-actively boundary layer control method and passive boundary layer control method.

介绍了厢式货车的减阻方法——主动控制边界层法和被动控制边界层法。

youdao

"This is a relief, frankly, " said Maria Teresa van der Ree, 81, president and founder of the Civil Resistance of Venezuelans Abroad, a non-profit group.

WSJ: Chavez death: Venezuelans in US hopeful of change

Mark van Gisbergen's third penalty extended it before Wasps ended Quins' resistance with a late penalty try.

BBC: Wasps 26-15 Harlequins

Walcott made amends by finally unlocking Sunderland's brave resistance after 80 minutes, sliding in a neat pass for Van Persie to steer a left-foot finish past Gordon.

BBC: Arsenal 3-2 Sunderland