单嘴真空精炼装置是一种新型的炉外精炼设备。
Single snorkel vacuum refining equipment is a new style refining equipment.
喂丝机是炉外精炼设备之一，它对提高钢的质量具有十分重要的意义。
Metal thread feeding machine is one of the refining equipment outside the steel-making furnace, which is quite important to improve steel-making quality.
虽然需要将焦油砂转化为石油的升级和精炼设备成本高达数十亿美元，但这种技术仍在尝试和试验阶段。
The upgrading and refining facilities required to turn tar to oil cost billions of dollars, but the technology is tried and tested.
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