压

And the countdown. First to set the countdown began time, pressure Settings button to display window, enter 0-99 when 59 countdown clock time, then start over from the start button preserved value and value, if not modify began countdown timer starts value directly over time pressure, pause key, ChangLiang seconds to continue button.

倒计时。首先要设置倒计时开始时间，压设置键显示窗口在闪烁，输入0-99时59分倒计时开始时间，然后压倒计时开始键保存设定值且从设定值开始倒计时，若不修改设定值则直接压倒计时开始键，暂停计时压暂停键，继续计时压继续键。

Trough long practise and research, the fracturing technology is getting perfecter and perfecter,but in contrast, the fracturing equipment is unsuitable,so the fracturing technology cannot be put into effect normally.

在长期的实践和研究中，压裂及酸化工艺日趋完善，相比之下，压裂及酸化设备与之很不相适应，严重影响了压裂及酸化工艺的正常实施。

Comparison between the velocity distributions at the different flow rate conditions showed that increasing the flow rate was help to improving the velocity distribution. The periodic mean field on r-6 plane at different axis positions showed that the flow within the vaned diffuser, especially within the inlet region, was periodic unsteady when impeller located at the different circumferential position, just as the flow within the vaneless diffuser.

有叶扩压器内平均流场的分析表明，在定常流动的假设下，不同流量工况下有叶扩压器的内部流动也呈现为沿轴线向后盘方向推移流动状况逐渐恶劣的分布规律，表明二元叶片构成的平行直壁有叶扩压器对轴向不均匀流动的掺混作用仍然不大。

The difficulty of the existing piezoelectricity theory to solvepiezoelectric dynamics problem is pointed out.

以分析横场伸缩振动压电片的动力学为例，指出已有建立在压电本构方程基础上的求解压电体动力学理论的困难。

From this test results, it is obtained that the maximum lateral displacement occurs at a depth of about 0.75L; land upheaval build up rapidly and reach the maximum when the pile tip arrive at depth of about 6 m; and the increment. of excess pore water pressure reaches the maximum when the pile tip arrive at the piezometer level; while the maximum excess pore pressure presents a hysteresis quality with radial distance.

由测试结果可知，最大的侧向位移发生在距地表0.75L附近，地面隆起从桩贯入开始迅速发展，并在桩压入到6m左右时达到最大值，测点处超静孔压增量的最大值发生在桩端到达该点所在水平面时，而超孔压的最大值沿径向有滞后性。

The authors think that it is untenable for restraining the application of slotted-pipe piezometer by dam height and delay reaction ruled in the technical specification for fill-dam monitoring.The appropriate methods used should be selected upon practical effects.Furthermore,the sensitivity,accuracy and long period stability have been discussed,the performance of long period stabilit...

土石坝安全监测技术规范中不应以坝高和渗压滞后作为限制采用测压管的理由，采用何种监测方式应注重实际效果；对渗压监测仪器就灵敏度、精度、长期稳定性等多项指标进行讨论，指出长期稳定性应作为埋设仪器选型的主要指标。

Before preloading, a lot of extensometers, inclinometers, piezometer tips and settlement plates were installed. The deformation and pore pressure of ground were observed during preloading; Three years'creep settlements were monitored under the maximum preloading load so as to provide the field data for the new model.

预压前在地基中埋设了沉降标、深层沉降管、测斜管、孔隙水压力计等土工观测仪器，堆土预压过程中对地基的变形和孔隙水压力进行全面观测，以及预压后长达3年的流变观测，为模型的工程验证提供了实测资料。

In the re-pressed tests with jacked pipe piles in soft clay, it was observed that the re-pressed starting pressure can reach to more than 2.5 times the final pressure for 25 days after finishing the installation; and it increased more rapidly in early period than later.

对饱和软黏土地基中的静压管桩进行隔时复压试验发现，复压起动压桩力在沉桩25d后的增长幅度达2.5倍以上，且前期增长较快而后期较慢。

The total and of the pitot tube were measured when the opening of the regulating valve was changed with keeping the flowrate fixed as well as unchanged the opening of the regulating valve with invariable flowrate. Then, the dynamic pressure signals were analysed with the method of PSD after computed and normalized and a better result of frequency-domain distribution was obtained. In addition, the average energy was defined and used for the analyzing of disturbance signals of regulation valve.

首先利用皮托管对相同流量不同开度及相同开度不同流量下的总压及静压信号进行测量，然后经过计算得到动压信号并进行归一化处理；其次，对归一化处理后的动压信号进行功率谱分析，取得了较好的频域分布结果；同时定义了信号的平均能量，并将其应用到了调节阀扰动信号的分析中。

The additional calculation error of measuring gas flow capacity through planimeter calculating av - erage value between differential pressure and static pressure with dual bellows differential pressure flow capacity table is discugsed in this paper .

本文讨论了从双波纹管差压流量卡片上，用求积仪求得差压和静压的平均值计算天然气流量方法所产生的附加计算误差；分析了差压和静压在不同的变化趋势下，附加计算误差的大小和方向；提出了改进和预防的建议。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐