The medium and small - sized furnace stack gunning with unshaped refractory materials is a new repatching technology.
中小型高内衬喷补是采用不型耐火材料以喷射法的一项新技术。
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Sometimes they even took unshaped rocks with them to make into tools later on.
有时他们甚至携带着不的石块,以便在日后把它们工具。
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