El camión rodó cuesta abajo porque el conductor no puso una cuña bajo las ruedas.The truck rolled downhill because the driver didn't place a wedge under the wheels. The article illustrates book supports developed at the Bodleian Library using units of wedge-shaped foam cut to standard sizes. Las cunas https://mejorescunas75184.vidublog.com/28808095/cuna-fundamentos-explicación