The dust concentration distribution on the electric field section in ESP is not uniform, this is one of reasons to produce secondary blowing dust.

电除尘器内电场断面烟尘浓度呈非均匀性分布，它是产生振打二次扬尘的重要原因之一。

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The research was carried out by archaeologists Jim Leary and David Field, who dug a cross-section tunnel into the monument in 2007.

BBC: Prehistoric Silbury Hill 'was built in layers'

Without it, no real success is possible, no matter whether it is on a section gang, a football field, in an army, or in an office.

FORBES: Without It, No Real Success is Possible

The former England captain attempted to jump over a barrier as he left the field at half-time into a section of the crowd that had been jeering him.

CNN: Beckham dismisses confrontation with fans