coefficient of passive earth pressure受働土圧係数じゅどうどあつけいすうpassive earth pressure: 受働土圧{じゅどう どあつ}coefficient of active earth pressure: coefficient of active earth pressure主働土圧係数しゅどうどあつけいすうcoefficient of earth pressure: 土圧係数{どあつ けいすう}