压

Experiment 1: After air injection, pressure inside pressure plethysmograph increasedsharply to peak pressure, then decreased to horizontal pressure and kept no change.

实验1：在空气注入压力型体积描记箱后，描记箱内压力迅速上升至一个高峰，然后下降至一个高于0cmH_2O的基线压，峰压显著高于基线压(P＜0.001)。

Self-type press plier, the only one on the line model that can satisfy the different sizes of casing pressure to the terminal.

自调式压线钳只需一个压线模即可以满足不同尺寸的套管式端子的压接。

Test results show that, with the addition of polyvinyl acetate, the compressive strength and compressive modulus of mortar decrease distinctly, but the ultimate strain increases significantly. The uniaxial tensile strength and bending strength increase a little, but the tensile peak-strain and the ratio of tensile-compressive and bending-compressive increase remarkably.

试验结果表明，随着聚醋酸乙烯的掺入，砂浆的轴压强度和弹性模量显著下降，但极限应变却明显增大；砂浆的轴拉强度和抗弯强度均略有提高，而极限应变、拉压强度比和弯压强度比则显著增加。

The optimizing fracturing design chiefly includes fractures parameter optimization of fracturing wells, the volume of pre-conditioning fluid and preflush, the optimization of pump parameter and program, the optimization of fracturing technology parameters (Optimizing various kinds of proppant, concentration, volume and program and the adding way to optimize the reasonable operation parameters so as to improve the fluid diversion in natural formation fractures and main fractures).

压裂优化设计主要包括压裂井裂缝参数优化；预处理液和前置液用量、泵注参数和程序的优化；压裂工艺参数优化(以提高地层天然裂缝和主裂缝导流能力为目标，优化各种支撑剂类型、浓度、用量和程序，以及加入方式等；优化合理的施工参数)。

Main products are the pneumatic bed, hydraulic press, precision press, high-tech digital type hydraulic press, hydraulic press, hydraulic press, hydraulic press, small four-cloumn hydraulic press, C type hydraulic press, booster press, film coating machine, LCD lugs pressure pneumatic hydraulic cutting machine, etc.

主导产品有气动压床、油压机、精密油压机、高科数字油压机、门型油压机、小型油压机、油压冲床、四拄油压机、C型油压机、增压压床、薄膜开关压凸机、液晶保护膜裁切机等气动液压机械。

Products has led pneumatic pressure beds, a hydraulic machine, precision hydraulic machine, hydraulic press Gaoke digital, large hydraulic machine \ door-type hydraulic machine, a small hydraulic machines, hydraulic punching machine, the four columns in a hydraulic press, C type hydraulic press, pressure booster bed, membrane switch convex pressure machine, LCD protective film cutting machine Hydraulic machinery.

主导产品有气动压床、油压机、精密油压机、高科数位油压机、大型油压机\门型油压机、小型油压机、油压冲床、四拄油压机、C型油压机、增压压床、薄膜开关压凸机、液晶保护膜裁切机等气动液压机械。

This paper analyses theoretically the take-down function of weight and presser foot, and the cause of the floating up of the fabric edge.

本文从理论上分析了横机上重锤和压脚的牵拉作用和可能产生织物上浮的原因，利用专门设计的压脚装置、口齿-针槽传感器测定了这两种牵位方式的牵拉效果，并分析了实验所得数据和结果，得出了加装压脚装置将有助于牵拉作用的完善的结论。

The power machine is run by a foot treadle and uses a knee lift to raise and lower the presser foot.

工业缝纫机是通过压脚启动的，用膝盖运动抬起压脚或降落压脚。

Under the action of high confining pressures, the main reasons for the decrease in the strength of frozen fine sand are: pressure melting of pore ice, particle-size breakdown and the growth of microcracks; for frozen silty clay, they are: pressure melting of pore ice and the growth of microcracks.

围压作用下，影响冻结砂土强度弱化的主要原因是孔隙冰的压融、矿物颗粒细化和微裂隙的发育；影响冻结粉质粘土强度弱化的主要原因是孔隙冰的压融和微裂隙的发育。

The upper disposed booster pump with pressure tank method is considered to be most rational and reliable.

通过对目前高层建筑消防给水常用的四种稳压和增压方式的分析，认为上置稳压泵＋气压罐的方式最为可靠、合理，还对该稳压和增压方式的具体设计提出了建

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