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第一次熔化时,由于受到当时条件的限制,在经济效果方面没有得到数字的比校,在1957年6月又进行了第二次的实际熔化.
At the first melting, due to the limitations of prevailing conditions, no numerical calibration of school was obtained in terms of economic effects. In June 1957, a second actual melting was carried out.