Nano gold solution means the small sizes of gold, which have a diameter of 1 to 100 nm, have excessive electron density, dielectric homes, and catalysis. Colloidal gold nanoparticles with various particle diameters can be readily prepared...

Bearing, I believe everyone will not be unfamiliar; it is an integral part of contemporary mechanical equipment. In the early form of linear motion bearing, a row of wooden poles was placed under a row of skid plates. Modern linear motion b...

As a non-load-bearing concrete material, foam concrete density is three hundred ~ 1600kg / m3; that's equal to approximately 1/five ~ 1/eight of everyday cement concrete, which could lessen the general load of the constructing and decrease t...