Is there a way to do this is to bring beef half-kilogram dried on a winnowing basket,the oven, oven, solar energy and Solar Energy lens convex the invention by the glass and steel structure attached to the bottom of the aluminum, using a clear glass plate 1 attached to the top angle 45 degrees to the lightRemove the plate and steel and brick Mon the spray paint black and then go to put it in at the bottom to vacuum the light and vacuum heat from the second part of the heat energy added by the convex lens 6.
การแปล กรุณารอสักครู่..
![](//thimg.ilovetranslation.com/pic/loading_3.gif?v=b9814dd30c1d7c59_8619)