Mount central vacuums on a wall away from the grooming area so only the overhead vacuumhose 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。
3
The engine, as it cooled itself, sucked in air through the outlet hose, producing suction in the vacuum chamber, and so drawing the plunger down and compressing the spring.