In the mid '60s, Chongqing was the key investment district of third-line construction of China, becoming the nation's important industrial base.
六十年代中期，重庆是中国三线建设的重点投资区，成为全国重要的工业基地。
If trimming has not been done after the deadline, the power line construction unit may do trimming itself.
逾期未进行修剪的，线路建设单位可以进行修剪。
The transformer is used in the transmission and distribution of power to reduce the conductor size in line construction.
变压器用于电能的传输和分配，以减小在线路架设中导线的截面尺寸。
Product usages cover market demands in rail transportation line construction, vehicle manufacture, bridge, tunnels and modern high-rise buildings etc.
产品用途涵盖轨道交通线路建设、车辆制造以及桥梁隧道、现代高层建筑等方面的市场需求。
In DC transmission line construction design, current national standard of economical current density will under predictcd conductor section, resulting in large loss.
在直流输电线路工程设计中，如果按我国现行标准规定的经济电流密度选择导线截面，将导致截面偏小，损耗增大。
Line repetition measurement is on important link in transmission line construction, which directs the localization of poles and towers, directionality and linearity of lines.
线路复测为线路杆塔的定位、线路的方向性、直线性等提供依据，是输电线路施工的重要环节。
This machine is the assistant equipment for fusing and cold varnish index line construction. It is mainly applied to the cleaning work before the road index line construction.
高压路面吹风机是热熔、冷漆标线施工中的辅助设备，用于道路施工前的清扫工作。
In the overhead line construction process, we generally use the formula calculation method to calculate all the force and the length, or use manual mapping method to draw and measure.
在架空线路施工过程中，我们通常对各种受力和长度采用计算公式法进行计算，或采用手工作图法绘图测量。
With the practicing of "four vertical and four horizontal" high-speed railway passenger transport network gradually, China's passenger special railway line construction on an unprecedented scale.
随着“四纵四横”高速铁路客运网骨架的逐步实施，我国铁路客运专线建设规模空前。
Using dynamic programming theory for optimized staking of transmission line in sections is one effective way to obtain the comprehensive optimum economic indexes for transmission line construction.
应用动态规划理论进行输电线路分段优化排位是找出输电线路建设最佳综合性经济指标的一种有效途径。
Aiming at the problem of net-shell connector's rated load not meeting the requirement of overhead transmission line construction, a special traction tube was developed to help with tension stringing.
针对网套式连接器的额定载荷目前还不能满足架空输电线路工程施工要求这一问题，为方便张力放线试制了一种专用的牵引管。
During construction, key problems including automatic cutting of through line, construction quality management, as well as erection of large-span truss were solved.
施工中解决了相贯线的自动切割和施工质量管理及大跨度桁架的安装等关键问题。
During construction, key problems including automatic cutting of through line, construction quality management, as well as erection of large-span truss were solved.
施工中解决了相贯线的自动切割和施工质量管理及大跨度桁架的安装等关键问题。
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