Turbomolecular pump pumping system of the basic method of operation: A turbopump extraction system with a separate roughing line operates in a similar manner to a diffusion pump extraction system. Before starting rough pumping, the high vacuum valve and roughing valve are closed while the foreline

Maintenance of large-scale pump units directly affect the maintenance time, repair quality and maintenance costs. To determine the five elements of the maintenance of the pump unit: the maintenance of the object, the conditions, the provisions of procedures and methods, the provisions of time, the p

According to the person in charge of Guangzhou Zhonglian Machinery Development Co., Ltd., a local machinery manufacturer in Guangzhou, the company mainly exports food processing equipment and equipment to more than 80 countries and regions in the world. In the past ten years, the sales volume has r

"The rules for the adjustment and revitalization of the petrochemical industry clearly state that China will implement a national reserve system for chemical fertilizers." An expert who participated in the drafting and has received detailed instructions on the adjustment and revitalizati

Weifang News, April 23th This year's spring plowing is different for Li Guoqiu of the Heilongjiang Agricultural Land Reclamation. He has more than 20 years of experience in driving tractors. He is driving the current domestically produced Maxi-powered Levo Oubao 2654 self-owned brand tractor i

"The rules for the adjustment and revitalization of the petrochemical industry clearly state that China will implement a national reserve system for chemical fertilizers." An expert who participated in the drafting and has received detailed instructions on the adjustment and revitalizati

Cauliflower uses fertilizer types. In the production of non-polluting broccoli, the fertilizers allowed for cauliflower are basically divided into four categories: (1) Organic fertilizer: including human and animal manure, compost, manure, biogas fertilizer, green manure, crop straw, mu

The Weichai Power Company and some of its holding subsidiaries obtained the High-tech Enterprise Certificate Announcement: In accordance with relevant regulations, Weichai Power and its holding subsidiary Zhuzhou Ougerui Drive Co., Ltd. was identified as 2008 through local preliminary review

All-computer-controlled dehumidifiers are used. Humidity sensors are precision instruments. Use in highly corrosive gases and dusty environments can cause the instrument to malfunction. When using the machine, apply a dedicated power supply and note that the voltage of the power supply i

Maguire Asia has announced the introduction of an innovative drying system that uses a newly designed wheel dryer and a unique airflow layout that not only saves space for PET resin processors, reduces maintenance costs and energy consumption, but also The adjustment of the feed rate and characteri

Many peasant friends have reflected that when seed companies purchase seeds, they are worried that they will miss a hard year's harvest because they have picked the wrong seeds. In fact, there are some basic principles for distinguishing good and bad seeds. If you grasp these principl

Recently, the appraisal of Jiangsu Provincial Science and Technology Progress Award in 2008 has come to a successful conclusion. Our company's 4L88 diesel engine and L12 diesel engine have won the provincial and municipal science and technology progress awards through reviews and public