The application of floating principle in automatic guns is an important means to reduce the recoil action.

浮动原理在自动炮上的应用，是减小自动炮后坐力的重要途径。

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Device used to move automatic guns in a vertical plane. A reversing or reciprocating drive system provides motion.

喷枪在垂直面自动移动的装置，一个回动的或往复式的提供移动的装置。

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They hold the crews hostage with machine-guns and semi-automatic pistols, then force the captain to anchor off the northern part of Somalia’s coast for several weeks until a ransom is paid.

他们用机枪和半自动手枪挟持船员作人质，然后逼迫船长在索马里海岸北部抛锚数周直到收到赎金。

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New York's law also sets a seven-bullet limit on magazines, tightens the definition of illegal "assault weapons" and requires owners of formerly legal semi-automatic guns to register them.

WSJ: VA says it won't follow New York gun law

The law bans certain semi-automatic guns and large magazines, requires owners to register within a year any once-legal guns banned under the law's tighter definition of "assault weapons, " and outlaws bringing them into New York from elsewhere.

WSJ: NY counties urging gun law repeal

The guns covered by the original were not the fully automatic machine guns used by the military, but semiautomatic versions of those guns.

WSJ: John Lott: The Facts About Assault Weapons and Crime