Gain Express Holdings Ltd., established in March of 2003 and based in Hong Kong, is a professional supplier of excellent products worldwide and whose objective is the satisfaction of each consumer by....

Non-destructive test ( NDT) service, welding inspection, welding procedure, material test consultant

Grand Index Solution Enterprise Limited is providing portable & professional optical intruments: hand held refractometer, digital refractometer, gem refractometer, magnifier and loupe etc...

we are established in 2010 and based in Hong Kong, is a professional supplier of inductrial equirement products worldwide. our objective is the satisfaction of each consumer by understanding what you....