By analyzing its structure and working principle, it proves that the new circuit has little pollution to the network and has well characteristic of the output voltage.
通过简单分析该主电路的结构形式和工作原理，证明它是一种对电网污染少、整流输出电压特性好的焊接电源主电路形式。
Due to the need of hydraulic transmission oil source, the structure is relatively large and complex, and there is a certain pollution to the environment.
由于液压传动需要油源，结构相对庞大和复杂，且对环境有一定污染。
The uncertainties come from synthetic action of input and output structure, investment of pollution control, environment policies, etc.
这种不确定性主要来自于经济的投入和产出结构、污染治理投入和环境政策等因素的综合作用结果。
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