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Only a well-trained technician should be able to guess ....

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Only a well-trained technician should be able to guess from far that the boy in the barren land is looking after a rabbit keeping. This sounds nearly unbelievable, considering the hot climate at the border of the Sahara desert. The hint is offered by the two overlaying pneumatics. They have the function to close a pit structure and to avoid the wind blows the sand inside.