Operational characteristics of the flow control valve and its principle The flow control valve controls the flow of the throttling orifice by changing the liquid resistance of the throttling orifice under a certain pressure difference, thereby regulating the movement speed of the actuator

The developer may not specify the ready-mixed concrete supplier or purchase ready-mixed concrete directly. Yesterday, the website of the Beijing Municipal Construction and Construction Commission released the “Circular on Printing and Distributing Several Opinions on Strengthening th

Comprehensive foreign reports, the data of US light vehicle sales (headings and the following as “car sales”) in January 2012 have been released a few days ago, with total sales of 913,000 units, an increase of 11% year-on-year. In January 2012, the United States sold 913,284

Researchers at the University of Aalto in Finland have developed a new method that can reduce the cost of manufacturing fuel cells. Common fuel cells require the use of expensive precious metal powder catalysts to fully react the anode and the fuel, so the high catalyst cost is the biggest

A special project for the development and application of plasmonics-enhanced Raman spectroscopy (PERS) instruments for the development of major national scientific instruments and equipment was held. The preliminary meeting of Xiamen University was successfully held on December 18, 2011 at

Longchuan Village, Beichuan County, Sichuan Province emits white smoke for 3 minutes to roast eggs diesel generator | diesel generator price / 2012-03-09 “A large mountain in Longping Village, Chenjiaba Township, Beichuan, collapsed during the earthquake and formed a huge accumulation

In 2011, Haiyan County implemented the strategy of “City with Shanghai, Hangzhou and Ningbo” on the basis of the implementation of the strategy of Jiaxing City and “Shanghai-Hangzhou City,” and based on its actual development, the city’s “Shanghai-Hangz

On the one hand, it is the re-marking action of Liuzhou Automobile Co., Ltd., but it is Dongfeng Group’s strong opposition. At the beginning of this month, Liu Weidong, deputy general manager of Dongfeng Motor Corporation, publicly stated in Tianjin that Dongfeng’s popular re

Domestic urea prices have continued to rise recently. As the spring market gradually started, dealers from all over the country began to stock up. In particular, the market in the northeast region started well and contributed significantly to the overall north market. Therefore, the urea price in

The city has held 14 wave of car purchase indicators, and the lottery program has stabilized. Yesterday, I was informed by the Municipal Communications Commission that under the premise of ensuring “openness, fairness, and fairness”, we will gradually optimize and streamline the on-site

First, weighing instability occurs: 1 The bottom protection screw is not loosened or not delivered to the place (generally 3-4mm,) ※The common 2 sample holder is not placed well 3 The environment has an effect 2. The lamp is off: 1 There is no 摁 "head", (If you put

The history of last year is about to turn pages. Looking back at the deployment of a series of economic work in the central government during the 12th Five-Year Plan period, the construction machinery industry, which is closely related to national infrastructure, is showing a trend of high