China ’s Sinoma International Engineering Co Ltd said it has signed a US$580m deal with Saudi Cement Co to build two cement production lines.  The Shanghai-listed engineering firm said the production lines will be located in Hofuf in eastern Saudi Arabia .  Earlier this year the company won another contract to design and build a cement plant in Saudi Arabia worth US$167.5m.  Sinoma’s largest shareholder is state-controlled China Non-Metal Materials Corp.