50pcs screwdriver bits soocket wrench set
Do you believe it? There are more than 80 kinds of wrenches and spanners in Hans, but also full sizes. Hans wrenches and spanners are traditional and classical; it is not only have dual and wholly mirror finishe...
Advantages of forging, cold forging and cold forming :
High precision and accurate shape
Excellent surface quality
Improved mechanical characteristics
Considerable reduction of material
Limited machining time
One group of fire signal input，one group of fire signal output;
One group of police dispatch signal input，one group of police dispatch signal output; One group of anti-theft signal input，one group of anti-theft signal output;
One group of smoke ...