It is possible that, in the case of iron, the first users were nomadic. 赫伯特·乔治·威尔斯.世界史纲.
There were 9,990 users of the electric light, 443,074 incandescent lamps, and 7,353 arc lights. Edward W. Byrn.十九世纪发明进展.
Other big users are railroads, banks, mail-order houses, and city, state and government offices. 佚名.神奇的知识之书.
The early breech-loaders had been discarded, as it was not known how to make the breech gas-tight, and the explosions rendered the guns more dangerous to their users than to the enemy. 威廉·亨利·杜利特.世纪发明.
Small Users not Overlooked. 佚名.神奇的知识之书.
Men with wooden legs ride horseback, are expert users of the bicycle, and have even performed feats on the tight rope. Edward W. Byrn.十九世纪发明进展.
To illustrate: the dating attachment enabled users to apply the addressograph to their statement work. 佚名.神奇的知识之书.