This article also describes some efficient steps for operating edge roller , stabilizing convection of tin fluid and settling flow of glass fluid .

本文将从合理使用拉边机、稳定锡液对流、稳定玻璃液流等方面所采取的有效措施作一些介绍。

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In some parts of the city, hawkers, newspaper delivery boys, roller-skaters, even those who carelessly kicked a tin can down the street were targeted.

BBC: The dark side of silence