Nearly 5,000 patents have been granted in the United States for firearms, and about 2,400 for projectiles. Edward W. Byrn.十九世纪发明进展.
An important result of these changes is the use of elongated instead of round balls, this permitting of the employment of much heavier projectiles for the same width of bore. 佚名.神奇的知识之书.
As each of these projectiles weighed 1,400 pounds any battleship receiving such a broadside would probably have gone promptly to the bottom. 佚名.神奇的知识之书.
As a rule, however, non-exploding projectiles are used at night. 埃德加·赖斯·巴勒斯.火星公主.
The strife still continues between impenetrable armour plate and irresistible projectiles. 威廉·亨利·杜利特.世纪发明.
The object of the gun is to combine in one piece the destructive effect of a great many, and to throw a continuous hail of projectiles. 威廉·亨利·杜利特.世纪发明.
The _Hotchkiss_ revolving cannon is another celebrated American production named from its inventor, and constructed to throw heavier projectiles than the Gatling. 威廉·亨利·杜利特.世纪发明.
The construction of metals, both for cannon to resist most intense explosives and for plates to resist the penetration of the best projectiles, have received great attention. 威廉·亨利·杜利特.世纪发明.
Irresistible Projectiles and Impenetrable Armour Plate. 威廉·亨利·杜利特.世纪发明.
About the same time Comminges of France invented mortars which threw projectiles weighing 550 pounds. 威廉·亨利·杜利特.世纪发明.
The Dutch also invented the howitzer, a short gun in which the projectiles could be introduced by hand. 威廉·亨利·杜利特.世纪发明.
As to the Chinese is given the credit for the invention of gunpowder, so they must also be regarded as the first to throw projectiles by its means. 威廉·亨利·杜利特.世纪发明.
In the metal working art the making of firearms and projectiles has grown to wonderful proportions. Edward W. Byrn.十九世纪发明进展.
Made-up ammunition, with brass cartridge cases, and cast-iron and forged steel shells and armor-piercing projectiles. 佚名.神奇的知识之书.
They have had me down in the pits below the buildings helping them mix their awful radium powder, and make their terrible projectiles. 埃德加·赖斯·巴勒斯.火星公主.
Processes for hardening steel, as the Harveyized steel, have given rise to a contest between irresistible projectiles and impenetrable armour plate. 威廉·亨利·杜利特.世纪发明.
The projectiles shown are a three-inch capped, a four-inch capped, a five-inch and a six-inch uncapped, eight-inch uncapped and capped, ten-inch uncapped and capped and twelve-inch capped. 佚名.神奇的知识之书.