In order to contribute to analyse and compute easily setback moving devices on the projectile fuzes,and to make the fuze devisers be able to get the approximate acceleration curves with a few parameters such as tube length and muzzle velocity of the guns,the displacement-time curve and velocity-time curve of gun interior ballistic are fitted with the Logistic models,then the formula of projectile acceleration curves in bore are gotten by the derivation of the formula of fitting velocity-time curve.

為了便于炮彈引信后坐運動機構(gòu)的分析和計算，能使引信工作者只根據(jù)身管長度和炮口速度等少量參數(shù)就能獲得彈丸膛內(nèi)加速度近似曲線深夜在线观看网址，運用Logistic函數(shù)擬合火炮內(nèi)彈道的位移－時間曲線和速度－時間曲線奇米777米奇影888视狠狠，再對擬合得到的速度－時間曲線求導(dǎo)便得到了彈丸膛內(nèi)加速度近似曲線。

"During such corrective action, the competitor shall keep the muzzle of the handgun pointing safely downrange at all times ."

在這故障排除的過程中国产在线久，選手必須隨時保持槍口指向安全的地方欧美作爱网址。

White flashings are usual on the neck, chest, legs, muzzle, underparts, tip of tail and as a blaze on head.

白色通常出現(xiàn)在頸部、腿部別揉我的胸,嗯~啊~視頻網站、胸部www.色网址.com、口吻、身體下部加勒比首页、尾巴尖国产一级黄片欧美一级、及頭部的白筋。

White flashings are usual on the neck, chest, legs, muzzle, underparts, tip of tail and as a blaze on head.

頸部亚洲无码啪啪啪视频、胸部久久99精品视频A片、腿、吻部一级黄色在线视频、下體18禁黄色网站在线、尾尖有閃爍的白色，通常作為頭部的頭發(fā)臼紋人人起碰人人。

Regulations for big game hunting often specify a minimum caliber or muzzle energy for firearms .

對大型動物的狩獵法規(guī)往往規(guī)定最低口徑或槍口對槍支的能源另类图库区。

A gun with a narrowed bore near the muzzle .

絞筒槍一種有向槍口逐漸變窄的槍膛的槍

A few years ago a rabbit hunter stood with his hand on the muzzle of his gun when his dog jumped up and pulled the trigger with his paw.

幾年前，一只兔子亚洲欧洲成人在线观看，獵人站在他的手放在他的槍口時鸥美一级大片，他的狗槍跳起來，扣動扳機又黄又爽爽女性爽喷水视频，他爪子久久久久久蜜精品精品免费。

JS 12.7mm sniper rifles capable of launching 84 tungsten-type heart 12.7mm armor piercing shell, the shell warhead quality 28g, the diameter of tungsten alloy shells Heart 8mm, a mass of 22.5g, muzzle velocity 1150m / s, chamber pressure 324MPa, 1000m distance can be run through the thickness of 45 ° tilt of 15mm steel plate.

JS 12.7mm狙擊步槍可發(fā)射84式12.7mm鎢心脫殼穿甲彈，該彈彈頭質(zhì)量28g久久国产精品电影网，鎢合金彈心直徑8mm性欧美专区，質(zhì)量為22.5g，初速1150m/s嗷嗷喷水，膛壓324MPa免费黄色黄站，1000m距離上可貫穿厚度15mm傾斜45°的合金鋼板。

Many .22LR guns also were fitted with conical "blaster-like" flash hiders at the muzzle, which also carried the front sight base (rear sight was at the front of the magazine holding block).

許多尤物视频网在线。22輕機槍也被安裝了錐形&沖擊波一樣的口吻日本黄色网站软件，也進行了準(zhǔn)星基地（表尺&閃光hiders在該雜志的控股塊的前面）淫淫黄色一片。

Compared with the sail style and the hang style, the hitch kick style have advantages to join the front swing and trig swing of swing leg tightly, to speed the buffer and stretch of take-o?leg, to acquire more vertical muzzle velocity and to decrease losing of horizontal velocity, which results in more velocity and more angle when take o?.and more vertical height of body center, has advantage to obtain better result.

走步式空中技術(shù)能在起跳過程中通過緊密銜接的擺動腿加速前擺和制動前擺，加快起跳腿的緩沖和蹬伸動作速度3344e国产在线观看，促進身體重心獲得更大的垂直速度亚洲激情小说图片，而且水平速度沒有更多的損耗，從而獲得更大的騰起速度和騰起角欧美国产日韩另类综合在线，騰起時身體重心的垂直位置更高淫荡国产视频，最終取得優(yōu)異成績，促進跳遠(yuǎn)起跳技術(shù)朝著快速積極的方向發(fā)展久久av一区。