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Google dictionary has this information about the origin of ex: Submit a sample of academic writing, e.g., a dissertation chapter. But what is the origin of the usage as a prefix in the words.
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Is short for exempli gratia, and is in common use to introduce an example within a sentence. 防爆标志是设备的身份证，了解其含义有助于把握设备的防爆级别和适用环境。那么，ex db ib iic t4 gb代表什么？ ex标志表明设备具有防爆性能，这是防爆设备的必备标. Does ex have a full form?
防爆标志ex d iic t6 gb是一个详细的电气设备防爆标识，它由多个部分组成。 ex是中国及国际电工委员会的防爆标志，表示该设备遵循gb3836和iec60079的防爆标准。 d代.
防爆标志ex de iic t6 gb的含义是：该电气设备具有防爆功能，采用隔爆和增安复合型防爆形式，适用于除煤矿外的其他爆炸性气体环境，其设备表面温度不超过85℃，且设备保.
