TXC无源晶振12MHZ SMD3225贴片晶振7M12070003 ¥0.50 TXC晶振7B12000224 12MHZ 5032四脚无源贴片晶振 ¥0.80 7M12070015贴片晶振12MHZ 10PF 10PPM SMD3225无源晶振 ¥0.49 12M贴片晶振7M12070019 SMD3225 18PF 30PPM无源晶振 ¥0.50 TXC贴片无源晶振7M12070021 12MHZ 3225石英晶振 ¥0.50 SMD3225贴片晶振7M12070027 TXC无源晶振 ¥0.45