严格按操作要求使用仪器，本仪器采用单相三线插头，连接地线以确保用电安全。
Operation rules should be strictly followed. The instrument ADAPTS with a mono phase three pin plug, which connects to the earth for safety.
高处的终端D'连接线圈的A'中心，其它终端更适宜连接地线，同样，对于线圈C'在此之上鉴于安全再次提醒。
The elevated terminal D' connects with the centre of the coil A' and the other terminal is connected to earth and preferably, also, to the coil C' again for safety reasons as mentioned above.
非防爆区域内穿线管连接处两端，应焊接跨接线，或用接地线通过接地卡连接。
At both ends of conduit in non-explosion proof area, the bridging lines should welded or the earth wires should be connected with clamp.
注2说明连接电源线接地线的端子还是可以连接其它接地线的。
NOTE 2 The earthing conductor in a supply cord is not considered to be an equipotential bonding conductor.
本热水器配置一根柔软的接地线，用于连接标准的三线、接地插座。
This water heater is supplied with a flexible grounded power cord that connects to a standard three-wire grounding-type receptacle.
箱体和箱门上都可安装接地线，连接件可以卸下。
The grounding wires can be fixed on case body and case door. The connecting parts can be detached.
加热器电路接地线直接连接到地面，加热器电路电源线也直接从点火电路或继电器盒处提供。
The heater circuit power wire is supplied directly from the ignition circuit or a relay and the heater circuit ground is connected directly to the ground plane.
加热器电路接地线直接连接到地面，加热器电路电源线也直接从点火电路或继电器盒处提供。
The heater circuit power wire is supplied directly from the ignition circuit or a relay and the heater circuit ground is connected directly to the ground plane.
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