【简答题】Some choppy sentences (断断续续的句子) can be rearranged by parallelism. Wind is an enduring source of power. Water is also an unlimited energy source. Dams produce hydraulic power. They have existed for a l...
【简答题】1-1 What is pneumatic transmission? 1-2 How many parts does a hydraulic or pneumatic pressur transmission system consist of? What are they and what are their functions? 1-3 What are the advantages and...