Just as the length and cro - section of the pipe affect the flow of water so it is with conductors of electric current.
正如管道的长度和截面会影响水流一样，导体对电流的影响也是如此。
The section of specimens was examined by optical microscopy and the composition of mi-cro-area at the welding seams and the matrix was analyzed and compared.
用微区成分分析方法研究了焊接面处与基体成分之间的差别。
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