U iron是什么意思

用法例句

The adhered ferrous spots on the porcelain bodies of i ns ulators are caused by the rusts and dusts in the pipelines of gas and high-pres sure wind, and to counter these defects the effective countermeasures are put f orward in this paper.

电瓷产品落铁缺陷是由于煤气管道和高压风管道内的铁屑和积尘引起的,就如何防止这一缺陷提出了有效对策。