这种双折射不仅与光纤本身的性能有关，还与工作时的环境温度、振动等因素有关。
The birefringence is not only affected by the features of fiber itself but also is under the influence of environment factors such as temperature and vibration.
打印机、复印机等办公设备时有卡纸现象发生，特别是在满足高速打印和双面复印等市场需求时，其送纸机构还产生严重的振动和噪声。
Office equipments, such as printers, copiers, are prone to problems of paper jam, especially in high speed print or two side copy, there are also serious vibration and noise.
这些规定应包括有出现如高水位报警，金属温度急剧下降或蒸汽管道振动等征兆时必须采取的措施。
These regulations shall include the necessary measures for such symptoms as high water level alarming, metal temperature sharp fall or steam pipe vibration.
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