该公司经营了多久了？他们是否有相应业务的资质注册与证明？
How long have the company been up and running? Are they properly certified and registered to handle their business?
本文介绍工程预决算中材料价差的形成和特点，以及相应业务处理的方法。
This article sets forth the formation and the features of material price differences in project final accounts and its relative countermeasures.
如何优质高效的实现相应业务系统的建设，本文通过引进MDA给出了解决的答案。
How to do it with high quality and high speed is a problem. By introducing MDA, we have found the answer.
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