• December 25, 2017

D&S Trading Co.,Ltd. is professional machine trading company, which respresative for our relative factorys.We supply you first class quality machine with best service. Our machine include all faucets, valve, brass fitting, cartridge, brass parts, teflon tape machines.For more information,welcome to visit our company's website http://www.desuautomatic.com When...

• May 20, 2023

The specific working principle of the core projector Resin sand shell core method is a detailed core process, it is containing phenolic resin core sand (shell core sand) into the heated metal box, keep a certain time (5~15s), near the core wall of the core sand resin dissolution and sand bond together, along the core chamber wall with the determined thickness of the plastic state shell. After pour...

• June 05, 2023

The working principle of fiber laser is as follows: The pump light emitted by the pump source is coupled into the gain medium through a mirror. Since the gain medium is a rare-earth-doped fiber, the pump light is absorbed, and the rare-earth ions that have absorbed the energy of the photon undergo an energy level transition and achieve particle count. Inversion, the inverted particles pass through...