Politeness is like an air cushion: there may be nothing in it, but it eases our jolts wonderfully.
I don't know whether someone punctured an air cushion just then, or whether it was me heavin' a sigh of relief.
The service rendered by the standpipe is similar to that of the air cushion discussed in Section 184.
But this time the newcomers were three in number and rode in air cushion hover-lorries, the twins of that used by Homer Crawford.
At many faucets in a city water system such an air cushion is employed.
Two common devices for controlling sudden changes in the water pressure are the standpipe and the air cushion.
It had just been equipped with an air cushion, and the men escaped without a scratch.
Even with an air cushion, the "pound" of the water in the pipe when a tap is suddenly closed is often heard.
Synchro mechanisms reduced the air cushion as the speeds dropped to afford more surface traction for the tracks.
Politeness is like an air cushion; there may be nothing in it, but it eases the jolts wonderfully.