... 5.BTO-10,12,18,22,28,CBT-60,65. concertina wireis a kind of modern security fencing materials fabricated with ... , government buildings and other national security facilities. Recently years, barbed tape has apparently become the most popular high-class fencing wire ... ±0.052.5±0.165±221±1100±2 Barbed Tape Concertina (CBT);Barbed Tape Obstacle (BTO) Standard materials are either galvanized or stainless ...