This objective of this research is to study the development of the pararubber tapping knife in order to determine the optimum of the edge and oblique angle and to compare the efficiency of the electrical motor and Je-Bong knife. The product was manufactured by iron steel carbon S45C and AISI 5160 with 75-90 degree edge knife and 0-45 degrees oblique angle. The results can be concluded that the optimum condition of the edge knife oblique knife and the cutting force were 75 degree 45 degree and 3.51-51.42 N respectively. It was found that the cutting force was straightly increased form 0-51.42 N and then gradually decreased. The energy consumption of timber cutting was 0.00370 J/mm3. The quality of the rubber tap using electrical motor was 72.07% which was higher than 2.8 of Je-Bong knife. As the results this product shows the average of rubber timber which is 2.22 mm. in 22.51 s.

The purpose of this study is design to develop double-walled design of natural materials (bamboo) to reduce radiant heat into the building. Reduce construction costs by using natural materials that are readily available locally. And can reduce the cost of energy use in the residential conditions occurring prior to cozy up to. The results of the double-walled design forms the third and then put to the test transmission of the sun. And select the appropriate model to test the temperature of the material other five by the results of the experiment showed that during the day as the first the second the fourth the fifth the temperature inside the box. The outside temperature is lower than the highest temperature. Especially in the case of five minimum temperature inside the box than any event since the space between two walls of floor to localized heat. But in this study tested the two-story wall material that attaches to the outside of the building is important. Wall mounted double-walled bamboo in the open with temperatures under all circumstances.