根据用户提供的电气原理图及技术参数确定选
用防爆元件，然后确定外形及安装尺寸
The choose the explosion-proof elements de-
pending on the schematic diagram of electricity
provided by user, consequently, to decide the
outline and mounting dimension.
电气原理图根据用户提
供的系统图绘制
The chematic diagram
should be drawed according
to users system diagram
