What are the hours of work? ●●●●●● para fiv Sound waves move ●●●●●● until they are ●●●●●●ted by the ●●●●●●rm above. The ●●●●●●- and ●●●●●●rd-●●●●●● waves ●●●●●●p, ●●●●●●rcing each other in ●●●●●● and ●●●●●●ling out in ●●●●●●. This traps ●●●●●●als in place.
