Using the action-oriented simulation strategy, a simulation software of percussion and rotary drilling has been developed.

根據(jù)本文建立的數(shù)學(xué)模型，采用面向活動的策略編制了一套能模擬沖擊回轉(zhuǎn)鉆井系統(tǒng)鉆井的仿真軟件www.shyeze.com。

The dynamic model can not only help to improve the design of the impactor, but also help to determine its working properties and design the percussion drilling bottom hole assembly.

該動力學(xué)模型不僅可用于改進(jìn)液動沖擊器的設(shè)計(jì)18岁免费欢看黄色网站，而且可用于優(yōu)選液動沖擊器的性能參數(shù)和沖擊鉆井鉆具組合設(shè)計(jì)。

For a long time, they used percussion drilling - which basically means they hammered away at the ground to get as deep as they could get.

很長時(shí)間里他們用沖擊鉆井——基本上就是不停地砸地面日韩成人丝袜在线视频，直到砸不動插逼AV。

For a long time, they used percussion drilling - which basically means they hammered away at the ground to get as deep as they could get.

很長時(shí)間里他們用沖擊鉆井--基本就是說，不停錘打地面盡可能到達(dá)一個(gè)最深的深度可以免费看黄的网址。

In our life, especially in mechanics and engineering sciences, there are many nonsmooth phenomena. For example, the noise of a squeaking spoon in a bowl, or the chattering of machines, the grating of brakes, the percussion of drilling machines, the switches of auto-controller, the oscillation of crystal, etc.

在我們生活中九九C片一级黄片，特別是在力學(xué)和工程技術(shù)領(lǐng)域，經(jīng)常會遇到非光滑現(xiàn)象：比如勺子在碗里刮擦?xí)r發(fā)出刺耳的噪聲欧美激情免费性爱，或者機(jī)器的振動丝袜人妻无码中文字幕综合网、剎車的摩擦、打孔機(jī)的沖擊色色色色香蕉、自動控制器的轉(zhuǎn)換以及晶體的振蕩等等欧美一区二区中出视频。

percussion drilling：[機(jī)]沖擊鉆

astrological 占星的, 占星術(shù)的 | percussion drilling [機(jī)]沖擊鉆 | compensating beam 平衡梁

percussion drilling：沖擊鉆探

perched water level 上層滯水位 | percussion drilling 沖擊鉆探 | percussion precast concrete pile 撞擊式預(yù)制混凝土樁

percussion drilling：沖魂

percussion drill hammer 沖魂錘 | percussion drilling 沖魂 | percussion penetration method 撞會入法

percussion drilling：沖魂井

percussion drill 沖喚鉆機(jī) | percussion drilling 沖魂井 | percussion drilling machine 沖喚鉆機(jī)

rotary percussion drilling：旋轉(zhuǎn)沖喚鉆進(jìn)

rotary percussion drill 旋轉(zhuǎn)沖喚鉆機(jī) | rotary percussion drilling 旋轉(zhuǎn)沖喚鉆進(jìn) | rotary pump 旋轉(zhuǎn)泵