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to a Coalminer’s Knowledge and Skills
The
coalminer had to know how to carefully place the dynamite in the right location
so that it would blast in the right direction. He had to know exactly how many
sticks of dynamite were needed so that the dynamite would not make too big or
too little an explosion. The blast
needed to be big enough to expose the vein of coal, but not so big that it
would cause the tunnel to collapse.

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Knowledge and Skills