压力

The principal of buffer is described as follows.At impulsing down,the piston moves down and vacates the annular space.The pressure in respiratory cavity decreases to a certain level and the traveling valve opens.At that time,the liquids enter into traveling valve and cavity and the plunger is impulsed upward to carry out the gentle transient at the sudden change.When the upward impulsing begins,the respiratory cavity is subjected to pressure and the traveling valve closes.During the gradual pressure rising,the liquids in respiratory cavity effuse from the upper ventage and the sudden change of force-summing direction of plunger is relieved relying on the resistance of ventage.

其原理大致是：下冲程时，活塞向下运动，让出环形空间的体积，呼吸腔内压力下降，下降到一定水平后，游动阀打开，此时，游动阀和小孔同时进液，使柱塞在从上死点处突然改变方向向上运动时得到缓冲，实现了柔和过渡；当上冲程开始时，呼吸腔受压，游动阀关闭，在压力逐渐上升的过程中，呼吸腔内的液体从上部的小孔流出，并依靠小孔的阻力使柱塞受力突然换向得到缓冲。

At the same time, the economic is developing, the traffic equipment in city, especially the recoverable amount of the automobile is increased rapidly, but because the elastic coefficient that the area of the road of area that builds up city increases is very small, the city road was built and has not slowed down the traffic pressure in the city very well, this kind of pressure has brought very big restriction to development of the city.

同时随着经济的发展，城市机动化设备，尤其是汽车的保有量迅速增长，但由于城市建成区道路面积增加的弹性系数甚小，城市道路建设并没有很好地减缓城市交通压力，这种压力给城市的发展带来了很大的制约。

With the acceleration of industrial growth came acute urban crowding and accompanying social stress – conditions that began to approach disastrous proportions when, in 1888, the first commercially successful electric traction line was developed.

随着工业化的加速发展，城市里出现了严重拥挤和相伴而来的社会压力。当1888 年第一条商业上成功的电气化铁轨被制造出来时，压力开始接近危机的程度。

With the acceleration of industrial growth came acute urban crowding and accompanying social stress--conditios that began to approach disastrous proportions when,in 1888,the first commercially successful electric traction line was developed.

随着工业化的加速发展，城市里出现了严重拥挤和相伴而来的社会压力。当1888年第一条商业上成功的电气化铁轨被制造出来时，压力开始接近危机的程度。

With the acceleration of industrial growth came acute urban crowding and accompanying social stress -- conditions that began to approach disastrous proportions when, in 1888, the first commercially successful electric traction line was developed.

随着工业化的加速发展，城市里出现了严重拥挤和相伴而来的社会压力。当1888年第一条上成功的电气化铁轨被制造出来时，压力开始接近危机的程度。

With the acceleration of industrial growth came acute urban crowding and accompanying social stress -- conditions that began to approach disastrous proportions when,in 1888, the first commercially successful electric traction line was developed.

随着工业化的加速发展，城市里出现了严重拥挤和相伴而来的社会压力。 1888 年第一条商业上成功的电气当化铁轨被制造出来时，压力开始接近危机的程度。

With the acceleration of industrial growth came acute urban crowding and accompanying accompanying social stress -- conditions that began to approach disastrous proportions when, in 1888, the first commercially successful electric traction line was developed.

拥挤和相伴而来的社会压力。当年第一条商业上成功的电气化铁轨被制造出来时， 1888 年第一条商业上成功的电气化铁轨被制造出来时，压力开始接近危机的程度。力开始接近危机的程度。

Indeed, most great cities of the united states achieved such status only by incorporating the communities along their borders.with the acceleration of industrial growth came acute urban crowding and accompanying social stress -- conditions that began to approach disastrous proportions when, in 1888, the first commercially successful electric traction line was developed.

今天很多美国的大城市其实就是靠吞并它们附近的边缘地区而变成大都会的。随着工业化的加速发展，城市里出现了严重拥挤和相伴而来的社会压力。当1888 年第一条商业上成功的电气化铁轨被制造出来时，压力开始接近危机的程度。

With the acceleration of industrial growth came acuteurbancrowding and accompanying social stress -- conditions thatbegan toapproach disastrous proportions when, in 1888, thefirstcommercially successful electric traction line wasdeveloped.

随着工业化的加速发展，城市里出现了严重拥挤和相伴而来的社会压力。当1888年第一条商业上成功的电气化铁轨被制造出来时，压力开始接近危机的程度。

Here is the main content.The control unit of this system use 8031 as the controller of CPU. It can collect the pressure singals of the gasoline tank and adjust the big and small of the fuel vapor pressure, cooperating with steam pressure sensor and electromotion valve.

主要内容有以下几点：(1)测控系统的控制部分是以8031单片机为CPU的控制器，它配合蒸汽压力传感器和电动调节阀完成油箱内信号采集和汽油蒸汽压力调节功能。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。