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1)  transforming single track into double track
单改双线
2)  rice field from double cropping to single cropping
双改单
3)  single speed changing into two-speed
单速改双速
1.
Through the project introduction including investigation and reforming experiences,as well as the analysis of comparing economic and technical index about single speed changing into two-speed in cycle water pump motor,it is proved that the reformation is feasible,its economic benefits is improved and can also provide the references for the same kinds equipment reforming.
通过对循环水泵电机单速改双速项目相关调研和改造情况的介绍,以及改造前后经济技术指标的对比分析,说明此改造项目可行性强、经济效益显著,可为同类型设备改造提供借鉴和参考。
4)  transferring Two-season farming rice to Sing- season one
双季改单季
5)  one-tunnel two-tracks
单洞双线
1.
2 Line projects of Iron Teheran subway, the author analyzes disadvantages of “Rail Arrangement Method" in the rail construction for one-tunnel one-track subway projects and features of one-tunnel two-tracks subway projects, and provides a new construction method, in which engineers can directly place assembled rails on the structural base floor of tunnels as temporary tracks of rail flat-cars.
依托伊朗德黑兰地铁一、二号线工程 ,针对地铁单洞单线采用的轨道施工轨排法存在的不足 ,根据单洞双线隧道的特点 ,提出了利用组装好的轨排直接铺设在隧道结构底板上作为轨道平板车临时轨道的施工新方
6)  reavy yarn
单双花线
补充资料:腊月中游发生洞裴回之际见双白蝙蝠三飞洞门
【诗文】:
欲验发生洞,先开冰雪行。窥临见二翼,色素飞无声。
状类白蝙蝠,幽感腾化精。应知五马来,启蛰迎春荣。
露冕□之久,鸣驺还慰情。



【注释】:



【出处】:
全唐诗:卷887-4
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
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