Glass steel communication cable marking pile: cable channel should add cable marking stone or marking board, should have cable corner mark, intermediate connector mark, power warning mark etc., marking stone and marking board content is different, but all require to have“Kabel elektrik Digging banned”、“Pressure dɔ Risk”Words and cable direction and type symbols, you can refer to cable construction drawing requirements. (Wɛ̈ɛ̈r dɔ̈ɔ̈r ku cable direction ku type symbol, ka lëu bï ya refer to cable construction drawing requirements.) Plastic Steel Glass Steel Marking Pile. Application Range: Plastic Steel Marking Applied to: Plastic Steel Marking Applied to: Plastic Steel Marking Applied to: Plastic Steel Marking Applied to: Plastic Steel Marking Applied to: Plastic Steel Marking Applied to: Plastic Steel Marking:Gas, water supply, petrochemical, broadcasting, electricity supply, communication, and pre-buried optical cables.