Mount central vacuums on a wall away from the grooming area so only the overhead vacuum hose is in the area where you'll be working.

把中央吸尘器装在一堵远离梳洗区的墙上，这样的话，架空吸尘器的排气管就可以正好放在你将要工作的地方。

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The serious corrosion problem at low temperature could be found in atmospheric-vacuum distillation unit, especially in the atmosphere overhead condenser.

常减压装置存在较为严重的低温位腐蚀问题，尤其是常压塔顶冷凝器腐蚀问题更为严重。

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With increasing acid value, density, salt and sulfur in Liaohe Crude, The HCI-H2SO4-H2O corrosion in overhead condensing system of atmospheric-vacuum unit was deteriorating.

辽河原油逐年来酸值增高、密度变大、含盐和含硫量有所增加，常减压塔顶冷凝冷却系统的“HCI - H_2S - H_2O”腐蚀日趋严重。

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Left in this vacuum most donors have settled on low administrative overhead as the barometer to determine the proficiency of an organization.

FORBES: Charity Isn't Cheap