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。

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We can get behind efforts to rid our country of semi-automatic weapons and prohibit high-capacity ammunition clips for any gun.

CNN: How a boy becomes a killer

Obama cited the major provisions of his package of gun proposals, including background checks on all gun sales, a ban on semi-automatic weapons that mimic military weapons, and limiting ammunition magazines to 10 rounds.

CNN: Obama challenges Republicans to help middle class grow

Proposals in the committee's package included expanding background checks on gun buyers, toughening laws against gun trafficking and straw purchases, banning semi-automatic rifles modeled after military assault weapons as well as large-capacity ammunition magazines, and coming up with ideas for improving school safety.

CNN: Reid to force a vote Thursday on debating gun proposals