The comparison of retention of diferent post and core systems 不同桩核系统固位力的比较研究
2.
The measurement of retentive forces in mandibular complete overdenture with magfit magnetic attachments 磁性附着体下颌全口覆盖义齿的固位力测定
3.
The influences of losses in optical transmission systems on carrier optical signal propagation are studied by using the conservation law and the viral theorem of the nonlinear system in this paper 摘要文章采用非线性系统的守恒律和位力定理对光传输系统中损耗对载波光信号传输的影响进行了研究。
