As a "frequent guest" in mahogany furniture, sapwood is often used by some black-hearted enterprises to transform. Although the use of sapwood is not good, it is .......

Sine pump is a kind of rotary volume, also known as rotary volume sinusoidal pump or volume sinusoidal pump, is one of the few truly positive displacement pumps in the field of innovation. Now to introduce the working principle and purpose of sine pump. Sine pump First, the sine pump works As.......

The plug gasket is a common form of static seal used in various fluid equipment of thermal power generation equipment, and leakage is a common failure mode of production equipment. With the high parameters and large-scale of thermal power generation, modern thermal power generation equipmen.......