为使这些模拟量或非标准数字协议输出的仪表升级为HART型智能仪表，一般需要定制与之相配套的电子部件或HART协议扩展模块。
If we want to update those analog or non-digital instruments to HART instruments, typically a kind of HART protocol expanding module (electric module) should be custom-designed for them.
为使这些模拟量或非标准数字协议输出的仪表升级为HART型智能仪表，一般需要定制与之相配套的电子部件或HART协议扩展模块。
If we want to update those analog or non-digital instruments to HART instruments, typically a kind of HART protocol expanding module (electric module) should be custom-designed for them.
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