In order to pass discontinuities, such as intersection (38), switch (39), public railroad crossings, driveways paragraph (40,41,42,43,45) can also be relatively open sink or off.瓦尔特·索博列夫斯基
In order to pass discontinuities, such as intersection (38), switch (39), public railroad crossings, driveways paragraph (40,41,42,43,45) can also be relatively open sink or off. 展开 收藏 引用 批量引用 报错 分享 全部来源 求助全文 Google Patents 相似文献 参考文献 引证文献...
While the Amber Routes were not roads in the modern sense, they were improved at river crossings, over mountain passes, and across wet and swampy areas. A few remnants of theseroads survive today. They were constructed by laying two or three strings oflogsin the direction of the road on ...