... 水准测段segment of leveling 高差difference of elevation；level difference 附合水准路线annexed leveling line ...
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Because of complex landform and big difference of elevation, transmission line in mountain area has its characteristics which are different form transmission line in common landform.
山区送电线路因其地形复杂、相对高差大，在许多方面都具有不同于普通地形送电线路的特点，对设计工作和勘测工作有更高的要求。
Its application range, i. e. great elevation difference and bad condition of foundation, are pointed out.
指出高架式布置的应用范围，即最适宜轧线标高差较大、地基条件差的车间。
According to topographical situation of Yanan Pipeline, conduct dead weight oil transporting test a - gainst elevation difference.
根据安延管道的地形情况，利用高程差进行了自压输油试验。
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