The invention relates to an improvementof a jacket tube in terms of inexpensive producibility and of suitability as a semi-finished product for optical fibers having a low optical attenuation.
该发明涉及的一件外衣管改善便宜的可生产性和适用性方面作为半成品光纤具有低衰减光纤产品。
2
This invention relates to an improvementof asphalt pump arrangement.
本发明涉及对一种沥青泵油装置的改进。
3
With the improvementof technology and invention of new analytical techniques, the trace elements can be measured accurately now.