Me cuesta decidir como de duro está ese cemento...
(https://lh5.googleusercontent.com/-oaTEwCxSHfA/VaVD_9z9WzI/AAAAAAABiBA/w1ARk-7Hvgk/s700/_MG_8801.jpg) (https://lh5.googleusercontent.com/-oaTEwCxSHfA/VaVD_9z9WzI/AAAAAAABiBA/w1ARk-7Hvgk/s0/_MG_8801.jpg)