作者: David P. Whalen
DOI:
关键词: Acoustics 、 Traffic conditions 、 Structural engineering 、 Engineering
摘要: A baton structure having first and second cylindrical housings arranged for securement relative to one another are provided, wherein each of the include housing tubes rods telescoping extension locking housings, with a resilient tip use as friction promote displacement along skating surface by an individual. The includes reflective mirror viewing traffic conditions rearwardly individual, fluid dispenser dispense defensive such (MACE) therefrom.