Common causes of squeaky bicycle breaks include brake pads that need cleaning, a dirty bike rim brake surface or brake pads that strike the rim evenly across the surface or with the rear part of the brake first. Brakes that are âtoed inâ are most effective.
To use anti-pass back, you would typically have a reader on both the entrance and the exit sides of the door. Once the cardholder has used his card on the entrance, the card cannot be used again at the entrance until it has been shown to have used the exit. Anti-pass back (APB) is most commonly used in car parks and on turnstiles on construction sites or sites using the access control system as a form of time and attendance. APB is a proven and effective way of managing car park spaces as it prevents a second car access on the same credential.
The Anti-Personnel Obstacle Breaching System (APOBS) is a self-contained, one-shot, expendable linear demolition charge which can be transported and deployed by a two-person team. It is capable of safely clearing a footpath through anti-personnel mines and multi-strand wire obstacles. Clearing a pathway 45 meters in length by 0.6 to 2.0 meters in width, one APOBS clears what it would take 27 sections of Bangalore Torpedo to clear. This lightweight system is carried in two backpacks, with a combined weight of 125 lbs and a setup time of less than 2 minutes. APOBS meets the Insensitive Munition (IM) safety and hazard standards defined in MIL-STD-2105 and it also meets the fuze board safety requirements of MIL-STD-1316.