M Supported by messenger wire的意思|示意
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M由信使线支持
M Supported by messenger wire的网络常见释义
用钢索敷设 塑料线槽敷设 PR Installed in PVC raceway 用钢索敷设 M Supported by messenger wire 穿聚氯乙烯塑料波纹电线管敷设 KPC Run in corrugated PVC conduit ..