Plank imayenera kukhala doko losavuta kwambiri padziko lapansi. Cholinga chake ndikungopereka zomwe doko likufuna ndipo palibe china chilichonse. Komabe, ndi laibulale yomwe imatha kukulitsidwa kuti ipange mapulogalamu ena a dock okhala ndi zida zapamwamba kwambiri.
