芝加哥正努力提高水的使用效率，替换渗漏的管道，安装水表。
Chicago is trying to become more efficient, replacing leaky pipes and installing water meters.
使用方便：直接喷涂， 效率高（特别是对外墙的渗漏，在不可重新铺设的情况下， 使用喷涂绝对有极好的防水效果。
Use convenient: direct spray, high efficiency (especially the seepage of exterior wall, in an repaved use spraying absolutely has excellent waterproof effect.
使用方便：直接喷涂，效率高特别是对外墙的渗漏，在不可重新铺设的情况下，使用喷涂绝对有极好的防水效果。
Use convenient: direct spray, high efficiency especially the seepage of exterior wall, in an repaved use spraying absolutely has excellent waterproof effect.
组合式空心转子由于轴头与转子体之间的结合面存在着渗漏，使泵的抽气效率性能下降，从而影响其在应用中的效率。
As there were leak on contact place between shaft and rotor body in built up hollow rotor, dropping discharg gas speed of pump and efficiency applied of oil sealed sliding vane rotary vacuum pump.
组合式空心转子由于轴头与转子体之间的结合面存在着渗漏，使泵的抽气效率性能下降，从而影响其在应用中的效率。
As there were leak on contact place between shaft and rotor body in built up hollow rotor, dropping discharg gas speed of pump and efficiency applied of oil sealed sliding vane rotary vacuum pump.
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