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(yùn)動(dòng)機(jī)構(gòu)的分析和計(jì)算天天色天天射天天干，能使引信工作者只根據(jù)身管長(zhǎng)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99爱免费视频最新版本，運(yùn)用Logistic函數(shù)擬合火炮內(nèi)彈道的位移－時(shí)間曲線和速度－時(shí)間曲線欧美精品一级一区，再對(duì)擬合得到的速度－時(shí)間曲線求導(dǎo)便得到了彈丸膛內(nèi)加速度近似曲線免费三级片一区。

"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(guò)程中国产多人操逼视频，選手必須隨時(shí)保持槍口指向安全的地方久久网亚洲精品。

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、腿部欧美淫秽视频、胸部免费一级特黄A毛大片看看、口吻、身體下部、尾巴尖91popny丨丝袜、及頭部的白筋黄色在线1级。

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

頸部、胸部一区免费精品视频、腿国产第页、吻部、下體男女XX00动态图视频gif、尾尖有閃爍的白色精品久久AV无码一区二区三区，通常作為頭部的頭發(fā)臼紋。

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

對(duì)大型動(dòng)物的狩獵法規(guī)往往規(guī)定最低口徑或槍口對(duì)槍支的能源麻豆一级毛片无码视频。

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.

幾年前来个能看的黄网，一只兔子，獵人站在他的手放在他的槍口時(shí)欧美日韩国产精品，他的狗槍跳起來(lái)99在精品，扣動(dòng)扳機(jī)，他爪子日韩一级特级视频。

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.

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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).

許多日韩高清性爱网站。22輕機(jī)槍也被安裝了錐形&沖擊波一樣的口吻亚洲中文字幕欧美国产，也進(jìn)行了準(zhǔn)星基地（表尺&閃光hiders在該雜志的控股塊的前面）。

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(guò)程中通過(guò)緊密銜接的擺動(dòng)腿加速前擺和制動(dòng)前擺妓女视频在线观看网站，加快起跳腿的緩沖和蹬伸動(dòng)作速度毛片无码在线看，促進(jìn)身體重心獲得更大的垂直速度，而且水平速度沒(méi)有更多的損耗喷水毛片一级，從而獲得更大的騰起速度和騰起角亚洲网站精品，騰起時(shí)身體重心的垂直位置更高，最終取得優(yōu)異成績(jī)色色综合色综合，促進(jìn)跳遠(yuǎn)起跳技術(shù)朝著快速積極的方向發(fā)展裸体女人毛片。