PCB shop when the grid grid width and spacing is generally how much? For example, the general single-chip learning board is generally how much?
You can choose . all covered. PCB production principle to know: we draw the time to pay attention to the thickness of the line, but the production time to understand the details of the process, that is, how many lines between the two? Because the PCB process is a piece of copper on the need to corrosion, then the corrosion of the spacing need to have a specification, too small gap on the process can not reach the domestic level of the general not less than 0.01mm. Corrosion gap is the PCB most concerned about, otherwise the design of things others do not come out.
To ask the main bar! Generally he put these accessories to sell you alone! To find him to, he will give you
The so-called serious consequences, not limited to causing serious injuries, death or public and private property suffered heavy losses
The composition of the training room According to the actual situation, the training can be carried out in three places: classroom, training room, room 1
