最终，用自由空气的数量乘以空气的压缩比即可得出排水所需的压力，以确定选择哪种空压机。
Finally, with the air of freedom multiplied by the number of air compression ratio that the pressure can be drainage, to determine choose which kind of air compressor.
重新设计在自由广场的旁边增加了一个宽敞的挡土墙墙，以解决排水问题，最初要求交通部拆除几个两个单元的楼房，米尔斯说。
The redesign adds an extensive retaining wall beside Liberty Square to solve the drainage problem initially requiring DOT to demolish several two-unit buildings in the complex, Mills said.
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