abrasive surface造句

• The heat expansion coefficient of casting nylon materials is about 10 times larger than steel , so the internal dia shrinks caused by the expansion . it will influence the connection gap of the abrasive surface
  铸型尼材料的热膨胀系数约比钢材大10倍左右，所以轴套在运行时由于摩擦热所造成的膨胀变形使内径缩小，影响摩擦面的配合间隙。
• It means that these gemstones are able to resist scratching almost as well as diamond . abrasive surfaces , harsh chemicals , and sharp blows can damage even the toughest gem . your gemstone jewelry should be the last thing you put on when getting dressed and the first thing you take off at the end of the night
  钻石首饰可在容器里加水和洗衣粉，把钻石戒指放在水里煮10分钟，使上面的污物变软，然后用牙刷刷洗后，在清水里冲洗，再用90度酒精清洗，最后拿出晾干。