485通讯电缆在一般场合采用双绞线就可以，但在要求比较高的环境下可以采用带屏蔽层的双绞电缆。
RS-485 communication cable in general occasion using twisted pair can be, but under the high requirement of environment can be using tape shielded twisted pair cables.
RD7000TL电信行业专用能识别大捆双绞电信电缆里的个别电缆。
RD7000TL Telecom Industry Large bundled pairs of cables require specialized location equipment to find a selected signal.
RD7000TL电信行业专用能识别大捆双绞电信电缆里的个别电缆。
RD7000TL Telecom Industry Large bundled pairs of cables require specialized location equipment to find a selected signal.
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