中压

A comparison is made of advantages and defects among protective measures,including adopting advanced imported regulator ,installing fast isolating valve in front of regulator ,using two-circuit regulator plus fast isolating valve,installing excessive underpressure automatic isolating valve in front of domestic gas meter etc.

分析了中压燃气直接进入用户燃气表的危害，比较了采用先进的进口调压器、在调压器前安装快速切断阀、采用双回路调压器加快速切断阀、在家用燃气表前装设超欠压自动切断阀等预防措施的优缺点，提出了其适用场所。

We are specializing in manufacturing rubber and plastic machine,highandmedium valve,pressure vessel,nonstandard equipment,metal structures and commercial castings.Especially,the Doublewheel trade tire curing press the main product of Sinorubber Machinery Co.,Ltd, is reach up to the advanced contemporary same lines.It has tire curing press of more than 20 kinds of specifications from 32"~135".

公司以橡塑机械，高中压阀门，压力容器，非标设备，金属结构件，商品铸件为主要产品，特别是主导产品&双轮牌&子午线轮胎定型硫化机达到当代国际同类产品先进水平，产品规格从32& 135&。

Turn the top feed cam until it reaches the position to allow the three components such as the throat plate surface, top end of needle eyelet and presser foot to align, and fix the cam at that position.

在针板上面、针孔上端、中压脚的3点对齐的位置，转动上送布凸轮，然后固定。

This series of instruments for low-voltage, medium voltage, high-voltage switchgear and distribution systems, central station monitoring system, generator set systems, building automation systems, energy management system, such as factories, able to measure three-phase three-wire, three-phase four-wire system current, voltage, active power, reactive power, apparent power, active power, reactive power, power factor, frequency, voltage triangular openings, the largest open-shaped voltage power parameters, at the same time with a remote, remote control function.

该系列 仪表适用于低压、中压、高压开关和配电系统、中心电站监测系统、发电机组系统、楼宇自控系统、工厂能量管理系统等，能够测三相三线，三相四线系统的电流、电压、有功功率、无功功率、视在功率、有功电能、无功电能、功率因数、频率、开口三角形电压、最大开口形电压等电力参数，同时带有遥信、遥控功能。

Based on the experimental feature of the cascades, the correspondent relationship of stage shaft power and efficiency between fixed and variable geometry was derived.

由于涉及到变几何工况，燃气轮机系统仿真中压气机低转速工况特性计算最为困难，计算压气机的变几何特性具有重要的意义。

For most of the new explorative lays are between 2000m and 3500m, and the geologic structure is complex, So there are many field problems for fracturing string, such as low packer pressurization ; leaking off of hydraulic anchor; serious erosion of the inwall for pressure transmitting sand blaster.

但由于新探明层位大都在2000米到3500米之间，地质构造复杂。现场施工中压裂管柱出现了诸如封隔器承压指标低；水力锚锚爪漏液；导压喷砂器内壁磨蚀严重等问题。

In allusion to the problems existing in using medium pressure air as drilling fluid under the conditions of breccia formed by small structural action, loose coal layer and unstable formations, new type of drilling tools and bits was designed. The mechanism of cutting removal by air media was stated and analyzed.

在针对小构造带形成的角砾岩、松散煤层、不稳定地层等瓦斯地质条件下，采用中压风作为冲洗介质进行钻探中所存在的问题，重新设计了新型的钻具级配、正反向一体化钻头等，并且对风介质的排渣机理进行了阐述和分析。

The financial risk of the electric utility is obtained according to the probabilistic characteristic of power supply reliability indices. Then the MV distribution network structure multiobjective planning model under PBR reliability government is constructed.

根据规划网架供电可靠性指标的概率分布特性得到供电公司面临的奖惩风险指标，进而建立PBR可靠性管理模式下的中压配电网网架多目标规划模型。

Production of "fly ball card" all kinds of high, medium pressure valve is a brand-name products in Sichuan Province.

生产的&飞球牌&各类高、中压阀门属四川省名牌产品。

The relationship between head's relative displacement and sheet s maximum deformation is deduced by circular function forming model.

通过圆函数变形模型，推导出两种典型零件成形中压头压入行程与板料最大变形量的函数关系。

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％。