We have had a mechanic look it over . He reports that the rotators appear to have been cracked before the machine was installed .
我们请一位机械师给检查了一下，他报告说，其转轴似乎在该机器组装之前已有裂缝。
Lead as impurity in rig ( rare earth iron garnet ) faraday rotators used for fiber optic communications systems .
于光纤通讯系统稀土铁石榴石法拉第旋转器中作为杂质的铅。
The following muscle groups may need to be stretched : low back extensors , lumbar rotators , lumbar lateral flexors , hip adductors , hip abductors , hip rotators , hip flexors and hamstrings .
