Over three years of work experience in the trade and some high school, college or industry courses in cement finishing are usually required to be eligible for trade certification.

通常需要具有三年以上行业内工作经验，和高中，大学或水泥整理行业课程，才有资格取得行业认证。

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Semi-finishing grinding systems with roller press are used more and more in new-built PC production lines and cement grinding stations.

辊压机半终粉磨系统在新建干法水泥生产线及水泥粉磨站中，近年来逐渐被广泛采用。

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CJCD surface finishing screed is widely used to strickle cement, concrete surface in building site and road construction. Its trait is for easy operation and transportation.

型抹平机主要用于建筑工地，公路等施工建设中的水泥和混凝土等地面的捣平。它的主要特点是操作轻便，容易搬运等。

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Vettel is aiming to cement his second place in the drivers' championship by finishing ahead of Barrichello on Sunday.

BBC: Superb Hamilton storms to pole