... able to cope with PCB-1 . Usage: 1, opened the machine, take the shockproof bubble, unclose double-sided adhesive paper which ... no more than worktable. Dont melt ferric chloride in the machine, the draff damage water pump easily.The ratio of solution ... , the circuit board which has been eroded washed away repeatedly, polish with sand paper, wipe rosin. Notes: 1, with good rubber ...