() includes adding solder paste to the board, pick and place of the components, soldering, inspection and test.
A. PCB manufacture
B. PCB circuit simulation
C. PCB design flowchart
D. PCB assembly and production process
() needs to be added to those areas of the board where solder is required.
A. solder screen
B. PCB file
C. solder paste
D. component pad
微信支付 
支付宝支付