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48500 layer pcb products are offered for sale by suppliers on Alibaba.com, of which pcba accounts for 46%, other pcb & pcba accounts for 22%, and multilayer pcb accounts for 11%. A wide variety of layer pcb options are available to you, such as factory, odm and oem/odm.You can also choose from electronic device, communication and oem electronic layer pcb,As well as from hasl, hasl lead free layer pcb,