William started 【7】on a model of a windmill and he used it to power a radio! He then built a much【8】windmill than usual with old pieces of junk.The villagers were amazed when they saw he used it to power four light bulbs and to charge(使充电) their mobile phones !William's ...
The invention relates to a work-platform (1) for the form of a corner, in particular for a column form in the so-called windmill principle. The work-platform (1) defines, in an L-shape, a recess (7), at the edges (5, 8) of which it is fixed to the form at at least three ...
The anemometer working principle is, the air stream will cool a heated object because the cooling rate can be determined by the airflow speed. A fine wire that is electrically heated can be arranged within the airflow. Once the flow of air increases then the wire gets cool. What is the ...
William started 【7】on a model of a windmill and he used it to power a radio! He then built a much【8】windmill than usual with old pieces of junk.The villagers were amazed when they saw he used it to power four light bulbs and to charge(使充电) their mobile phones !William's ...
William started 【7】on a model of a windmill and he used it to power a radio! He then built a much【8】windmill than usual with old pieces of junk.The villagers were amazed when they saw he used it to power four light bulbs and to charge(使充电) their mobile phones !William's ...