IC3

Relay IC3 opens , protecting the amplifier and clamping diodes .

继电器IC3断开，保护放大器和钳位二极管。

Rising overvoltage turns off both transistors in IC2 , interrupting current flow through the control LED of IC3 .

增加过电压关闭IC2中的电阻，通过IC3的控制LED中断电流流动。

Complement receptor type 2 ( CD21 / CR2 ) is a B lymphocyte cell membrane C3d / iC3 b receptor that plays a central role in immune respones .

补体Ⅱ型受体CD21/CR2是B淋巴细胞膜表面C3d/iC3b受体，在免疫应答中起重要的作用。