Give attention to the problem of operas. He try to find a way to alleviate the condition of wastewater. He invented a mechanical by To be used in wastewater treatment, and given to the Royal irrigation experimented invented calledAfter the facilities to test such appear good satisfactory and had been listed copyright, and certification from all over the world, that is, mechanical with excellent performance.
การแปล กรุณารอสักครู่..