The system has 256 MB RAM, expandable to 2GB.
这个系统内存256兆字节，可扩充到2千兆字节。
Expandable tube will be developed for well construction in single hole.
膨胀管技术的发展方向，是单一直径井眼的建井技术。
This method is simple for use and also has expandable ability if combining with the system design.
该方法简洁实用，结合系统设计仍有更进一步扩展的潜力。
Study on expandable tubular technology& key points and first application.
膨胀管关键技术研究及首次应用。
Research of optimization on personal expandable consumption during the life period.
生命周期个人拓展消费的优化研究。