Economic development requires us and technology enables us today to generate hydraulic energy in this country 随着我国改革开放和地方经济的进一步发展,迫切需要发展中小水电。
3.
Universal decimal classification - english full edition - heat engines in general - steam power - steam engines - boilers - water power - hydraulic energy 国际十进分类法.英文版全表.普通热力发动机.蒸汽动力.蒸汽发动机.锅炉.水能.液力