Mountaineering equipment. It is used to climb rock walls or ice walls with a lack of natural fulcrums and steep terrain. There are three kinds of ladders, short ladders and small hanging ladders. The ladders are generally 5 meters long. The ladders are made of thin steel wires that are joined together (requiring tensile strength of about 2,000 kilograms). The ladder beams (that is, beams) are made of hollow aluminum tubes (requiring tensile strength of about 300 kilograms). The distance between the two ladder beams is 30--50 cm. Two long ladders can be connected to each other from either end. They are used to climb over 7,000 meters or 8,000 meters above the steeply-rising ice wall and slopes. And crack area. The short ladder is generally 1-1.5 meters long. The ladder edge is composed of an auxiliary rope. The ladder beam is 12 centimeters long, 3 centimeters wide and 3 to 5 millimeter thick. It is made of aluminum sheet and the distance between the ladder beams is 50 centimeters. Small ladders generally have only two ladder beams. Sometimes, three ladder beams are specially made to form the same with the short ladder. Nearly, a soft small hanging ladder made of nylon belt is also more lightweight.
Tea Bag Packing Machine,Granule Packing Machine,Vacuum Packing Machine
Shanghai Packaging Machinery Co., Ltd. , http://www.zjvacuumsealer.com