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This is a list of companies on the Shenzhen Stock Exchange up to 2011, along with their capital, industry, and listing date. Many of these are subsidiaries of state-owned enterprises. Many of these are subsidiaries of state-owned enterprises.
An eccentric rotary vane pump Another eccentric rotary-vane pump design. Note that modern pumps have an area contact between rotor and stator (and not a line contact). 1. pump housing 2. rotor 3. vanes 4. spring. A rotary vane pump is a type of positive-displacement pump that consists of vanes mounted to a rotor that rotates inside a cavity. In ...
Different types of pumps are suitable for different applications, for example: a pump's maximum lift height also determines the applications it can be used for. Low-lift pumps are only suitable for the pumping of surface water (e.g., irrigation, drainage of lands, ...), while high-lift pumps allow deep water pumping (e.g., potable water pumping ...
A rotodynamic pump is a kinetic machine in which energy is continuously imparted to the pumped fluid by means of a rotating impeller, propeller, or rotor, in contrast to a positive-displacement pump in which a fluid is moved by trapping a fixed amount of fluid and forcing the trapped volume into the pump's discharge. [1]
The first transistor radio was released in 1954, and its manufacturing process made use of vacuum pumps. [ 43 ] The first integrated circuit or “chip” came to the market at the end of the 1950s, and vacuum pumps again played an important role in their production.
In April 2010. Piotech was founded by a group of returning international technology veterans from the United States along with the Chinese Academy of Sciences. [2] [3] [4]In 2015, Piotech announced that it had received a 270 billion yuan investment from a group that included the China Integrated Circuit Industry Investment Fund and Advanced Micro-Fabrication Equipment.
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