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3306 single layer pcb products are offered for sale by suppliers on Alibaba.com, of which pcba accounts for 33%, other pcb & pcba accounts for 20%, and multilayer pcb accounts for 7%. A wide variety of single 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 single layer pcb,As well as from hasl, hasl lead free single layer pcb,