精确: accurate; exact; precise 短语和例子精确的统计 accurate statistics; 下一个精确的定义 give a precise definition; 精确无误 with unerring precision; 计算之精确 precision in calculation; 她使自己的措词更加精确。 she fined down her c
Assures perfect alignment of disc and seat even at large flow velocities 即使在大流速下，也能够确保阀瓣和阀座的精确对准。
2.
Disc : crane ' s one piece flexible disc provides accurate alignment of mating seating surfaces so the valve can absorb piping strains without leakage 阀瓣：美国克雷恩一件式弹性阀瓣能够精确对准以适合阀座表面，这样阀门能够吸收化解管道应力，避免出现泄漏。
