Prime Contractor Lockheed Martin is gearing up for a flight test of the F-35B demonstrator aircraft, known as BF-1, possibly before 6 June, according to Lockheed Martin spokesman John Smith.
主承包洛克希德·马丁公司发言人约翰·史密斯称，洛克希德·马丁公司正在准备F - 35 B演示样机BF - 1的飞行测试，该测试有可能于6月6日前进行。
The erosion depth in the hearth of No. 8 BF were determined before blow-down in it's 1st relining, and the salamander-taphole was positioned reasonably and the salamander as tapped successfully.
宣钢8号高炉第一代大修时，在停炉前对炉底侵蚀深度进行了计算，并确定了残铁口的位置，使停炉后放残铁取得了成功。
The countermeasures of iron and steel industry in many countries before 2020 are energy saving and emission reducing in BF-BOF process and expanding EAF process.
在2020年前各国钢铁工业的主要对策是长流程节能减排，与扩大电炉炼钢为核心的短流程。
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