Keystone State

monsters of pennsylvania: mysterious creatures in the keystone state

宾夕法尼亚怪物：拱顶石州的神秘生物

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of the 956 workers who died in coal-mining accidents in the u. s. in 1891, for example, more than two-thirds perished in the keystone state.

以1981年为例，那一年全美共有856名工人死于煤矿事故，仅宾州煤矿就占了三分之二还多。

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keystone state independence state quaker state

拱心石州

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pennsylvania - keystone state, quaker state

宾夕法尼亚州里程碑州

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