压紧

Therefore it is necessary to research the mechanism of greensand used for high compacted molding methods thoroughly.This subject is one section of the National Natural Science Foundation subject ""Ivestigation on Predicting Method and Mechanism of Springback for High Compacted Sand Molds"", followed of the other completed one named ""Research on Microdeformation of Molding Sand"". A serious of experiments has been done on the reequipped three axial machine under certain technological conditions, and the mechanics, material science, rheologic science. It is systematically studied that the influences on the springback of sand mold were caused by the main influence factors: pressure, compacted rate and the content of soil. Through the analyzed experiments' data, the experienced stress-strain relationship concerning the main influence factors were obtained;under different technical parameter, the springback and spingback's potential energy are compared, the differences and indifferences between them are found out, and the springback's mechanism is discussed;according to the tests' data of YangGuoping coming from Tinghua University, experienced formula of molding sand's springback displacement is induced, the displacement and springback are compared, the margin of error's reasons are analyzed, and they are tested and verified mutually.

本课题为国家自然科学基金项目"高紧实度砂型预测方法及回弹机理的探讨"的一部分，是已结题的国家自然科学基金项目"铸造型砂微变形的研究"的后继，运用力学、材料学及流变学理论，利用改装的三轴仪，在一定的工艺条件下，作了大量系列实验，系统的研究了压实比压、紧实率和膨润土含量对砂型回弹的影响；对实验数据进行了分析和处理，得出了型砂关于压实比压、紧实率和膨润土含量的本构关系的经验公式；把各工艺参数下的型砂产生的回弹量与回弹势能进行比较，找出两者存在的异同点，并对回弹机理进行了探讨；通过清华大学杨国平的实验数据，推导出型砂回弹位移场的经验公式，并与实验测出的回弹量进行比较，分析误差造成的原因，并互相进行了验证。

In addition to the wholesale and factory production for the company products, but also the wholesale sling is famous throughout the country, wholesale prices because of too many types, to be directed to the Group's distribution business phone, other products are NRK hyacinth, NRK large gourd (30 -- 50 tons), light NRK hyacinth (80 kg-250kg), Shouban hyacinth, construction Shouban hyacinth, electric hoists, electric chain hoist, micro-block, space launches, and round, hydraulic jacks, screw jack, large jacks, pneumatic Jack, Jack-style separation, thin-jack, electric jack, horizontal jacks,双节Jack, Jack-cut, clamp-hanging, hanging clamp erection, flip hanging clamp, pliers oil drums, stacked plate clamp, car towing, Boutique cranes, lifting with fine, hoisting hook, rotating hook, tied up, tight-vehicle, single-waist belts, body belts, seat belt height, aluminum block-line, cross-top, from the Road, Hydraulic From the top machine, rotating from the top, Hydraulic Ramli, rotating Ramli, the electric Ramli, one Ramli hydraulic pressure machines, into machines, tiger-head tight line, Quchi tight line, from high-intensity Heavy chain, galvanized chain, the chain of steel, iron chain general, Qingdao spent Portland, dumping of deduction, the first card, bow dumping of deduction, American dumping of deduction and heavy dumping of deduction, hydraulic loaders, pneumatic hyacinth, various large Rope, Zongsheng, hanging net, lifting sucker, door-axis wheel, anti-skid chains, fine line tight, tight-line, Shuanggou tight line, railway line cards, Al-card, insurance deduction, rotating Central, rings, Jixin Central, for wire rope cut off, S-hook, lifting a round rope, hanging safety net, set a chain of cable, harness rigging sets, complete sets of rope rigging, injection wire rope, galvanized steel wire rope, hand winch, Removal tanks, high-altitude anti-dropping, balancer, anti-turn hook, electric basket, large-scale mining Tianlun, Mine Pulley, Marine pulley, electric, manual winch, various accessories, such as lifting.

本公司除批发本厂自产产品外，还批发全国各地名优吊索具，批发价格由于种类太多，需致电本集团经销公司电话，其他产品有手拉葫芦、大型手拉葫芦（30－50吨）、轻型手拉葫芦（80kg－250kg）、手板葫芦、建筑手板葫芦、电动葫芦、电动环链葫芦、微型滑车、天轮、地轮、油压千斤顶、螺旋千斤顶、大型千斤顶、气动千斤顶、分离式千斤顶、超薄式千斤顶、电动千斤顶、卧式千斤顶、双节千斤顶、剪式千斤顶、平吊钳、竖吊钳、翻转吊钳、油桶钳、层叠钢板钳、汽车拖带、精品吊车、精品吊装带、吊装勾、旋转吊钩、捆绑器、车用紧线器、单腰安全带、全身安全带、高空安全带、放线铝滑车、跨顶、起道机、液压起顶机、旋转起顶机、液压拉马、旋转拉马、电动拉马、液压一体拉马、压套机、插套机、虎头紧线器、曲尺紧线器、高强度起重链条、镀锌链条、钢制链条、普通铁链条、青岛花兰、卸扣、卡头、弓形卸扣、美式卸扣、重型卸扣、液压搬运车、气动葫芦，各种大绳、棕绳、吊网、起重吸盘、门轴轮、防滑链、精品紧线器、多功能紧线器、双钩紧线器、铁卡线器、铝卡线器、保险扣、旋转环、吊环、鸡心环、钢丝绳切断器、S型吊钩、吊装圆绳、安全吊网、成套链条索具、成套吊带索具、成套钢丝绳索具、注塑钢丝绳、镀锌钢丝绳、手摇绞盘、搬运坦克、高空防坠器、平衡器、防转吊钩、电动吊篮、大型矿用天轮、矿用滑车、船用滑车、电动、手动卷扬机、各种起重配件等。

Adjusting the packing 1 Pump packing (1) continue to hand tighten the squeeze cap nut;(2) after opening the pump, adjust the gland nut, this time to allow a little more leakage;(3) slowly tighten the squeeze cap nut, gradually reduce the leak until the leak to an acceptable level;(4) If the disclosure of a sudden stop, should be back to tighten the gland nut, packing re-adjustment in order to prevent overheating;(5) adjust the leakage rate can reach a steady state.

泵用盘根（1）继续用手拧紧压盖螺母；（2）开泵后，调整压盖螺母，此时截止阀允许有稍多的泄漏；（3）缓慢地拧紧压盖螺母，逐渐减少泄漏，直到泄漏达到可接受的程度；（4）如果泄露突然停止，应回拧压盖螺母，重新调节以防止盘根过热；（5）调节泄漏率达到一个稳定状态即可。

According to the way of the selection principle , discharge head and V block is selected to clamp the part .Then Computation of the strength is achieved by carrying on through the cutting force clamps .

根据夹紧方式的选择原则选择夹紧元件为压板压头和V型块，然后通过切削力进行夹紧力的计算。

The invention relates to a desk type drill machine for preventing drill head wreckage, comprises chassis, supporting post, operating board covered in middle of supporting post, cabinet and generator; cabinet is equipped with tension pulley pressure sensor, belt tension unit and pressure foil gage; tension pulley is compacted on driving belt of drill machine, pressure foil gage is installed on top bar of tension pulley, the pressure foil gage is in electric connection with input end of controlling circuit, output controlling end of controlling circuit is connected to power input end of generator.

本发明是防止钻头折断的台式钻床，包括底座、支柱、套在支柱中部的工作台、以及机箱和电机，机箱上设有张紧轮压力传感器，由皮带张紧装置和压力应变片组成，其中的张紧轮紧压在钻床的传动皮带上，压力应变片设在张紧轮的顶杆中，压力应变片与控制电路的输入端电连接，控制电路的输出控制端连接在电机的电源输入端中。

Enormous kinds of hub in different shapes are fastened and located by the chuck in various ways, such as fastened with external swing pressure plate and internal hook pressure plate (pressure plate to rotate by 90° to facilitate loading/offloading of workpiece), gripped with claw, and fixed positioning and moveable positioning, etc.

轮毂的品种很多，形状差别较大，卡盘的夹紧和定位方式各不相同，有外部摆动压板夹紧式和内部钩形压板(压板可转位90°，便于装卸工件)夹紧式，还有卡爪抱紧式等，有固定定位式和活动定位式等。

Steering clutch: Multiple-disc oil powder metallurgy disc compressed by spring. hydraulic operated.

转向离合器为湿式、多片粉末冶金摩擦片、弹簧压紧、液压分离。

Most lower back pain is referred to as 'non-specific' because it is caused, not by serious damage or disease, but by sprains, muscle strains, minor injuries, or a pinched or irritated nerve.

最下背痛，被称为'非特异性'，因为它是造成的，而不是由严重损害或疾病，而是由扭伤，肌肉紧张，轻微受伤，或一压紧或刺激神经。

Extensive currently on the car adoption of is use spring coil compress tightly of rub clutch.

目前在汽车上广泛采用的是用弹簧压紧的摩擦离合器。

The spring coil compress tightly dint more big, clutch ability deliver of turn Ju also more big.

弹簧的压紧力越大，则离合器所能传递的转矩也越大。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了