例句與造句

1. To obtain satisfying performance , the sea1 end faces of rotating ring and static ring of the mechanica1 seal must keep para11e1 or approximately paral1e1 each other
   欲使密封具有良好的性能，則必須做到受載后的動(dòng)、靜環(huán)密封端面間保持平行或近似平行的幾何形狀。
2. It's difficult to find rotating ring in a sentence. 用rotating ring造句挺難的