Ob chav helical iav, tseem hu ua herringbone gears, ua lub luag haujlwm tseem ceeb hauv kev lag luam tsim hluav taws xob. Lawv cov qauv tsim tshwj xeeb, tus cwj pwm los ntawm ob pawg ntawm cov hniav teeb tsa hauv V-zoo, muaj ntau yam zoo uas ua rau lawv tshwj xeeb rau daim ntawv thov no. Ntawm no yog qhov ze ze ntawm th...
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