Large size PCB super big size pcb-oil rig main board:board thickness 4.0mm, 4layer, L1-L2 blind hole, L3-L4 blind hole, 4/4/4/4oz copper, Tg170, single panel size 820*850mm. oil rig main board:board thickness 4.0mm, 4layer, L1-L2 blind hole, L3-L4 blind hole, 4/4/4/4oz copper, Tg170, single panel size 820*850mm.
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