送交者: xj 于 2005-12-14, 14:41:13:
回答: 有个帐不知能不能算出来:矿难次数和伤亡的年代表? 由 笑笑 于 2005-12-14, 14:31:13:
there is no accurate data available.
A careful survey is enough to reveal all problems.
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