PCB CASE>>Rigid Boards
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| Blue solder mask , Immersion gold ,six-layer | Immersion gold ,green solder mask ,white silkscreen | Black solder boards , Immersion gold |
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| Four-layer , Immersion gold, green solder mask ,white silkscreen | Aluminum | Difficult board，Layer Boards，Immersion gold |
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| Four-layer，HAL-LF，green solder mask ,white silkscreen | Four-layer，HAL-LF，1.6mm thickness | Double layer ,red solded mask |