Care must be taken to completely seal entrance plugs(eg. at a manway)in refractory linings.
必须小心地完全封闭耐火材料衬里进口门。
Care must be taken to completely seal entrance plugs(eg. at a manway)in refractory linings.
必须小心地完全封闭耐火材料衬里进口门。
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