Mount central vacuums on a wall away from the grooming area so only the overheadvacuum 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。
2
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。
3
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.