The reckoning diagram of coke yield for domestic coal resource is obtained on basis of first-hand date of thermal test and analysis fo r20 coke ovens by almost ten years' work.

在国内20座焦炉热工测试原始数据的基础上，经整理、归纳、分析，并采用二种方法，即线性回归法和程序回归分析法，首次获得了适合我国煤源的成焦率测算图。

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North Korea's first test is largely believed to have fizzled, with a yield of less than 1 kiloton, and the second was between 2 and 7 kilotons.

NPR: NKorean Nuclear Test May Be Intelligence Windfall