Its ripcord can be attached to heavy furniture or a special hook so that the parachute opens automatically after its wearer jumps out a window. 降落伞的开伞索可以绑在重家具或是特制的钩子上，带上这种降落伞的人一旦跳出窗外，降落伞便会自动打开。
Finally, OL in the varied speed wind tunnel is also investigated.Results show that the actual opening process can be well simulated. 同时，变速风洞的伞衣载荷研究表明，变速风洞可较好地模拟实际开伞情况。
