In ordinary stripping operations, the pipe falls into the wellbore under its own weight, and no additional downward force or pushing is required.
在平常的不压井起下钻作业中，管柱下入井眼是依靠其自身重量，不需要附加的向下载荷或者推力。
Moreover, the effect of real gas for small angle-of-attack case results in small downward force moment, whereas that for large angle-of-attack case results in small upward force moment.
此外，小攻角时真实气体效应产生小低头力矩，而大攻角时产生小抬头力矩。
Gravity constantly tugs downward on a slope, but only when gravity's force exceeds the strength of the rocks, soils, and sediments composing the slope does land begin to slide down hill.
重力不断的向下托拽山坡，当重力作用超过岩石、沙子和沉积物的强度，就形成滑坡，并使得地面开始沿着山坡滑落。
Similarly, if you are in Lotus and your top knee is not on the floor, pushing that knee downward can apply enormous damaging force to the meniscus.
同样，如果你双莲花坐时因为膝盖不能落到地板上，而用力下压膝盖的话，也会对半月板造成莫大伤害。
The force upward equals the force downward so that the balloon stays at the level.
向上的力与向下的力相等，所以气球就维持正在这一高度。
The force upward equals the force downward so that the balloon stays at the level.
向上的力与向下的力相等，所以气球就保持在这一高度。
Obviously the force of gravity is acting vertically downward.
显然重力的作用垂直向下。
This force then flows into the pituitary, from whence, being now in purified form, it flows downward, cleansing and strengthening body and mind.
这种力量接着流入脑垂体，在这里，它处于净化形式，它向下流，净化和强化身体和意识。
Compression: a mattress pad in the horizontal surface of the force applied vertically downward, causing the mattress by the force along the direction of surface displacement.
压缩量：在水平放置的床垫垫面上施加垂直向下的力，引起床垫表面沿受力方向的位移量。
This continual bombardment by a great number of particles keeps the piston at a certain height by opposing the force of gravity acting downward on the piston and the weights.
大量粒子的这种不断撞击，反抗着作用在活塞与重物上的向下作用的重力，因而能使活塞保持在某个高度上。
The key is absorbing the downward motion and reversing the force into an upward motion as rapidly and smoothly as possible.
要点就是吸收向下的动力，并尽可能迅速平稳地将这个力量转换成向上的动力。
Powdered solids or coagulated liquids are separated by centrifugal force and pass downward along the incline (conical) to a centrally located outlet.
粉状固体或凝固液体被离心力分离，向下沿斜坡(锥体斜坡)被送至位于中心的出口。
Second, the participation in the Labour force of prime-aged males (25 to 45) has been on a 60-year downward trend, while that of prime-aged females has flatlined for three decades.
第二，青年男性(25岁至45岁)劳动参与率的下滑态势已延续60年，而青年女性的劳动参与率30年来保持平坦。
Down force : The aerodynamic force that is applied in a downward direction as a car travels forwards.
下压力：当车辆向前行驶时，空气动力所施加的向下的力。
The direction of the force on the upper conductor is downward.
作用于上导体的力的方向朝下。
The force uptown equals the force downward so that the balloon stays at the level.
向下的力与向上的力相等，所以气球就保持在这一高度。副词成对出现，大多表示相反的意思。
The existing techniques and tools of entering casing mainly provide driving force to increase the downward power of the casing so that casing can easily enter horizontal well.
现有的下套管技术和工具主要是对套管提供迫动式驱动力，以增加套管的下行力。
The reactants are initially pumped vertically downward by the viscose drag force of the high speed rotating disk, and then are deflected to form a flow region that is parallel to the wafer carrier.
反应物在初始阶段因高速旋转盘的牵引力被竖直向下地泵入，然后偏斜形成一个与衬底片托盘平行的流动区域。
Finite element simulation results show that cutting force increases linearly at first, and then stabilized. The cutting force showed a downward trend with the cutting speed increases.
有限元仿真结果表明：切削力随着刀具的切入先迅速线性增大，然后趋于稳定，切削力随切削速度的增大呈下降趋势。
Finite element simulation results show that cutting force increases linearly at first, and then stabilized. The cutting force showed a downward trend with the cutting speed increases.
有限元仿真结果表明：切削力随着刀具的切入先迅速线性增大，然后趋于稳定，切削力随切削速度的增大呈下降趋势。
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