As a simple protocol, RS485 has some limitations in some aspects which is usually used in Electronic Tag system.
作为一种相对简单的通讯协议，在电子标签系统中常采用的RS485串行通信口具有一定的局限性。
In exchange, he guarantees an above-market price for each animal and a calf-to-customer electronic ear tag ID system like that used in the European Union.
作为交换，他向客户保证以高于市场的价格收购每一头动物，并为牛崽提供与欧盟类似的直达客户电子耳标身份识别系统。
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