本文试图通过建立双竖井隧道的活塞风计算公式，以解决双竖井隧道空气阻力计算的困难。

This paper attempts to establish a calculating formula of piston wind velocity in tunnel with double shafts to solve this problem.

youdao

本文试图通过建立双竖井隧道的活塞风计算公式，以解决双竖井隧道空气阻力计算的困难。

This paper attempts to establish a calculating formula of piston wind velocity in tunnel with double shafts to solve this problem.

youdao