ﺔﻳﻭﺎﻌﻣ ﺓﺮﻌﺷ (Rolling Ball)
.ﻦﻴﻌﻣ ﻖﻳﺮﻃ ﻝﻮﻃ ﻰﻠﻋ ﺝﺮﺣﺪﺘﻟﺍ ﻰﻠﻋ ﺓﺮﻴﻐﺻ ﺓﺮﻛ ﺪﻋﺎﺴﺘﺳ ، Rolling Ball ﺔ .ﺔﻳﻭﺎﻬﻟﺍ ﻕﻮﻓ ﺮﻤﻳ ﺎًﺟﺮﻌﺘﻣ ﺎًﻘﻳﺮﻃ ﻚﺘﺷﺎﺷ ﻰﻠﻋ ﻯﺮﺘﺳ .ﺎًﻴﺠﻳﺭﺪﺗ ﺎﻬﺘﻋﺮﺳ ﻂﻘﺘﻠﺗﻭ ، ﻖﻳﺮﻄﻟﺍ ﻝﻮﻃ ﻰﻠﻋ ﺝﺮﺣﺪﺘﻟﺎﺑ ﻚﺗﺮﻛ ﺃﺪﺒﺘﺳ ، ﺓﺭ .ﺔﺷﺎﺸﻟﺍ ﻰﻟﺇ ﺔﻳﺎﻨﻌﺑ ﺮﻈﻧﺍ .Rolling Ball ﺔﺒﻌﻟ ﻲﻓ ﻖﻳﺮﻄﻟﺍ ﻰﻠﻋ ﺓﺩﻮﺟﻮﻤﻟﺍ ﺔﻴﺒﻫﺬﻟﺍ ﺕﻼﻤﻌﻟﺍ ﻊﻤﺟ ﻚﻟﺬ