Kepler's 3rd law for circular orbits; Building up the shell-force by integration; Spring gun.
开普勒圆周轨道第三定律；利用积分推导球壳的引力；弹簧。
Used as a fatigue failure criterion, application of the model to the fatigue life prediction for the feeding spring of a medium calibre automatic naval gun proved to be comparatively satisfactory.
对数累积损伤模型作为—个失效判据，已在某中口径自动舰炮输弹簧的疲劳寿命预测中得到较满意的应用。
Reliability design theory with variety of failure mode is put forth to design gun brake spring concerning the fact that there are often defects in gun brake springs.
针对某火炮刹车弹簧经常出现废品的问题，提出了考虑多种失效相关模式的可靠性设计理论，推导了计算模型，并对此进行设计计算。
The fatigue life and cumulative damage of ammunition feeding spring in automatic naval gun of medium calibre have been analysed.
本文研究了中口径自动舰炮输弹簧的疲劳寿命及损伤规律。
The lookout on a whaling ship has sighted a spouting whale. all hands spring to their jobs. the harpoon er takes aim with his gun and fires. there is a short fight.
捕鲸船上的了望者看到了一头正在喷气的鲸鱼。所有的人立即投入各自的工作。鱼叉手用他们的鱼枪瞄准，然后开火。 这是一场非常短的战斗。
Until the spring of 1949, Jiangyin artillery fortress defenders include the total units, garrison corps, swimming Artillery, engineering battalion and so on, configure the various types of gun 78.
至1949年春，江阴要塞守军计有炮兵总台、守备总队、游动炮团、工兵营等，配置各类火炮78门。
The invention discloses a magnetic locking mechanism for weapon, comprising driving spring, casing, resistance iron for back seat, magnet, gun action and gun barrel.
本发明公开了一种武器的磁力闭锁机构，它包括：复进簧、机匣、后座阻铁、磁体、枪机和枪管。
The invention discloses a magnetic locking mechanism for weapon, comprising driving spring, casing, resistance iron for back seat, magnet, gun action and gun barrel.
本发明公开了一种武器的磁力闭锁机构，它包括：复进簧、机匣、后座阻铁、磁体、枪机和枪管。
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