Protective circuit inside and use reliably. Glod-plated contacts, durable.
内置保护电路，使用更可靠，镀金触点，经久耐用。
2
Some internal antennas are formed by a plated conductor on a substantially flat circuit board.
某些内部天线通过充分平坦的电路板上的镀敷导体形成。
3
Main products are as follows: a circuit board, gilded burnish, gold plated copper thick OSP protection (series), PCB plating copper brightener, PCB tin brightener, etc.